Ява для циклу використовується для повторення частини програми кілька разів. Якщо число ітерацій є фіксований , рекомендується використовувати цикл for.
У Java існує три типи циклів for.
- Простий цикл
- Для кожного або Enhanced for Loop
- Позначено для циклу
Java Simple for Loop
Простий цикл for те саме, що C / C++ . Ми можемо ініціалізувати змінна , перевірте умову та значення приросту/зменшення. Він складається з чотирьох частин:
архітектура linux
Синтаксис:
for(initialization; condition; increment/decrement){ //statement or code to be executed } Блок-схема:
приклад:
ForExample.java
//Java Program to demonstrate the example of for loop //which prints table of 1 public class ForExample { public static void main(String[] args) { //Code of Java for loop for(int i=1;i<=10;i++){ system.out.println(i); } < pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> 1 2 3 4 5 6 7 8 9 10 </pre> <h2>Java Nested for Loop</h2> <p>If we have a for loop inside the another loop, it is known as nested for loop. The inner loop executes completely whenever outer loop executes.</p> <p> <strong>Example:</strong> </p> <p> <strong>NestedForExample.java</strong> </p> <pre> public class NestedForExample { public static void main(String[] args) { //loop of i for(int i=1;i<=3;i++){ loop of j for(int system.out.println(i+' '+j); } end i < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 2 2 2 3 3 1 3 2 3 3 </pre> <p> <strong>Pyramid Example 1:</strong> </p> <p> <strong>PyramidExample.java</strong> </p> <pre> public class PyramidExample { public static void main(String[] args) { for(int i=1;i<=5;i++){ for(int j="1;j<=i;j++){" system.out.print('* '); } system.out.println(); new line < pre> <p> <strong>Output:</strong> </p> <pre> * * * * * * * * * * * * * * * </pre> <p> <strong>Pyramid Example 2:</strong> </p> <p> <strong>PyramidExample2.java</strong> </p> <pre> public class PyramidExample2 { public static void main(String[] args) { int term=6; for(int i=1;i=i;j--){ System.out.print('* '); } System.out.println();//new line } } } </pre> <p> <strong>Output:</strong> </p> <pre> * * * * * * * * * * * * * * * * * * * * * </pre> <h2>Java for-each Loop</h2> <p>The for-each loop is used to traverse array or collection in Java. It is easier to use than simple for loop because we don't need to increment value and use subscript notation.</p> <p>It works on the basis of elements and not the index. It returns element one by one in the defined variable.</p> <p> <strong>Syntax:</strong> </p> <pre> for(data_type variable : array_name){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>ForEachExample.java</strong> </p> <pre> //Java For-each loop example which prints the //elements of the array public class ForEachExample { public static void main(String[] args) { //Declaring an array int arr[]={12,23,44,56,78}; //Printing array using for-each loop for(int i:arr){ System.out.println(i); } } } </pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> 12 23 44 56 78 </pre> <h2>Java Labeled For Loop</h2> <p>We can have a name of each Java for loop. To do so, we use label before the for loop. It is useful while using the nested for loop as we can break/continue specific for loop.</p> <h4>Note: The break and continue keywords breaks or continues the innermost for loop respectively.</h4> <p> <strong>Syntax:</strong> </p> <pre> labelname: for(initialization; condition; increment/decrement){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>LabeledForExample.java</strong> </p> <pre> //A Java program to demonstrate the use of labeled for loop public class LabeledForExample { public static void main(String[] args) { //Using Label for outer and for loop aa: for(int i=1;i<=3;i++){ bb: for(int j="1;j<=3;j++){" if(i="=2&&j==2){" break aa; } system.out.println(i+' '+j); < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 </pre> <p>If you use <strong>break bb;</strong> , it will break inner loop only which is the default behaviour of any loop.</p> <p> <strong>LabeledForExample2.java</strong> </p> <pre> public class LabeledForExample2 { public static void main(String[] args) { aa: for(int i=1;i<=3;i++){ bb: for(int j="1;j<=3;j++){" if(i="=2&&j==2){" break bb; } system.out.println(i+' '+j); < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 3 1 3 2 3 3 </pre> <h2>Java Infinitive for Loop</h2> <p>If you use two semicolons ;; in the for loop, it will be infinitive for loop.</p> <p> <strong>Syntax:</strong> </p> <pre> for(;;){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>ForExample.java</strong> </p> <pre> //Java program to demonstrate the use of infinite for loop //which prints an statement public class ForExample { public static void main(String[] args) { //Using no condition in for loop for(;;){ System.out.println('infinitive loop'); } } } </pre> <p> <strong>Output:</strong> </p> <pre> infinitive loop infinitive loop infinitive loop infinitive loop infinitive loop ctrl+c </pre> <p>Now, you need to press ctrl+c to exit from the program.</p> <h2>Java for Loop vs while Loop vs do-while Loop</h2> <table class="table"> <tr> <th>Comparison</th> <th>for loop</th> <th>while loop</th> <th>do-while loop</th> </tr> <tr> <td>Introduction</td> <td>The Java for loop is a control flow statement that iterates a part of the <a href="/java-programs-java-programming-examples">programs</a> multiple times. </td> <td>The Java while loop is a control flow statement that executes a part of the programs repeatedly on the basis of given boolean condition.</td> <td>The Java do while loop is a control flow statement that executes a part of the programs at least once and the further execution depends upon the given boolean condition.</td> </tr> <tr> <td>When to use</td> <td>If the number of iteration is fixed, it is recommended to use for loop.</td> <td>If the number of iteration is not fixed, it is recommended to use while loop.</td> <td>If the number of iteration is not fixed and you must have to execute the loop at least once, it is recommended to use the do-while loop.</td> </tr> <tr> <td>Syntax</td> <td>for(init;condition;incr/decr){ <br> // code to be executed <br> } </td> <td> while(condition){ <br> //code to be executed <br> } </td> <td> do{ <br> //code to be executed <br> }while(condition); </td> </tr> <tr> <td>Example</td> <td> //for loop <br> for(int i=1;i<=10;i++){ <br> System.out.println(i); <br> } </=10;i++){></td> <td> //while loop <br> int i=1; <br> while(i<=10){ <br> System.out.println(i); <br> i++; <br> } </=10){></td> <td> //do-while loop <br> int i=1; <br> do{ <br> System.out.println(i); <br> i++; <br> }while(i<=10); < td> </=10);></td></tr> <tr> <td>Syntax for infinitive loop</td> <td> for(;;){ <br> //code to be executed <br> }</td> <td> while(true){ <br> //code to be executed <br> }</td> <td> do{ <br> //code to be executed <br> }while(true); </td> </tr> </table> <hr></=3;i++){></pre></=3;i++){></pre></=5;i++){></pre></=3;i++){></pre></=10;i++){> Java Nested for Loop
Якщо у нас є цикл for всередині іншого циклу, він відомий як вкладений цикл for. Внутрішній цикл виконується повністю, коли виконується зовнішній цикл.
приклад:
NestedForExample.java
public class NestedForExample { public static void main(String[] args) { //loop of i for(int i=1;i<=3;i++){ loop of j for(int system.out.println(i+\' \'+j); } end i < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 2 2 2 3 3 1 3 2 3 3 </pre> <p> <strong>Pyramid Example 1:</strong> </p> <p> <strong>PyramidExample.java</strong> </p> <pre> public class PyramidExample { public static void main(String[] args) { for(int i=1;i<=5;i++){ for(int j="1;j<=i;j++){" system.out.print(\'* \'); } system.out.println(); new line < pre> <p> <strong>Output:</strong> </p> <pre> * * * * * * * * * * * * * * * </pre> <p> <strong>Pyramid Example 2:</strong> </p> <p> <strong>PyramidExample2.java</strong> </p> <pre> public class PyramidExample2 { public static void main(String[] args) { int term=6; for(int i=1;i=i;j--){ System.out.print('* '); } System.out.println();//new line } } } </pre> <p> <strong>Output:</strong> </p> <pre> * * * * * * * * * * * * * * * * * * * * * </pre> <h2>Java for-each Loop</h2> <p>The for-each loop is used to traverse array or collection in Java. It is easier to use than simple for loop because we don't need to increment value and use subscript notation.</p> <p>It works on the basis of elements and not the index. It returns element one by one in the defined variable.</p> <p> <strong>Syntax:</strong> </p> <pre> for(data_type variable : array_name){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>ForEachExample.java</strong> </p> <pre> //Java For-each loop example which prints the //elements of the array public class ForEachExample { public static void main(String[] args) { //Declaring an array int arr[]={12,23,44,56,78}; //Printing array using for-each loop for(int i:arr){ System.out.println(i); } } } </pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> 12 23 44 56 78 </pre> <h2>Java Labeled For Loop</h2> <p>We can have a name of each Java for loop. To do so, we use label before the for loop. It is useful while using the nested for loop as we can break/continue specific for loop.</p> <h4>Note: The break and continue keywords breaks or continues the innermost for loop respectively.</h4> <p> <strong>Syntax:</strong> </p> <pre> labelname: for(initialization; condition; increment/decrement){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>LabeledForExample.java</strong> </p> <pre> //A Java program to demonstrate the use of labeled for loop public class LabeledForExample { public static void main(String[] args) { //Using Label for outer and for loop aa: for(int i=1;i<=3;i++){ bb: for(int j="1;j<=3;j++){" if(i="=2&&j==2){" break aa; } system.out.println(i+\' \'+j); < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 </pre> <p>If you use <strong>break bb;</strong> , it will break inner loop only which is the default behaviour of any loop.</p> <p> <strong>LabeledForExample2.java</strong> </p> <pre> public class LabeledForExample2 { public static void main(String[] args) { aa: for(int i=1;i<=3;i++){ bb: for(int j="1;j<=3;j++){" if(i="=2&&j==2){" break bb; } system.out.println(i+\' \'+j); < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 3 1 3 2 3 3 </pre> <h2>Java Infinitive for Loop</h2> <p>If you use two semicolons ;; in the for loop, it will be infinitive for loop.</p> <p> <strong>Syntax:</strong> </p> <pre> for(;;){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>ForExample.java</strong> </p> <pre> //Java program to demonstrate the use of infinite for loop //which prints an statement public class ForExample { public static void main(String[] args) { //Using no condition in for loop for(;;){ System.out.println('infinitive loop'); } } } </pre> <p> <strong>Output:</strong> </p> <pre> infinitive loop infinitive loop infinitive loop infinitive loop infinitive loop ctrl+c </pre> <p>Now, you need to press ctrl+c to exit from the program.</p> <h2>Java for Loop vs while Loop vs do-while Loop</h2> <table class="table"> <tr> <th>Comparison</th> <th>for loop</th> <th>while loop</th> <th>do-while loop</th> </tr> <tr> <td>Introduction</td> <td>The Java for loop is a control flow statement that iterates a part of the <a href="/java-programs-java-programming-examples">programs</a> multiple times. </td> <td>The Java while loop is a control flow statement that executes a part of the programs repeatedly on the basis of given boolean condition.</td> <td>The Java do while loop is a control flow statement that executes a part of the programs at least once and the further execution depends upon the given boolean condition.</td> </tr> <tr> <td>When to use</td> <td>If the number of iteration is fixed, it is recommended to use for loop.</td> <td>If the number of iteration is not fixed, it is recommended to use while loop.</td> <td>If the number of iteration is not fixed and you must have to execute the loop at least once, it is recommended to use the do-while loop.</td> </tr> <tr> <td>Syntax</td> <td>for(init;condition;incr/decr){ <br> // code to be executed <br> } </td> <td> while(condition){ <br> //code to be executed <br> } </td> <td> do{ <br> //code to be executed <br> }while(condition); </td> </tr> <tr> <td>Example</td> <td> //for loop <br> for(int i=1;i<=10;i++){ <br> System.out.println(i); <br> } </=10;i++){></td> <td> //while loop <br> int i=1; <br> while(i<=10){ <br> System.out.println(i); <br> i++; <br> } </=10){></td> <td> //do-while loop <br> int i=1; <br> do{ <br> System.out.println(i); <br> i++; <br> }while(i<=10); < td> </=10);></td></tr> <tr> <td>Syntax for infinitive loop</td> <td> for(;;){ <br> //code to be executed <br> }</td> <td> while(true){ <br> //code to be executed <br> }</td> <td> do{ <br> //code to be executed <br> }while(true); </td> </tr> </table> <hr></=3;i++){></pre></=3;i++){></pre></=5;i++){></pre></=3;i++){> Приклад піраміди 1:
PyramidExample.java
public class PyramidExample { public static void main(String[] args) { for(int i=1;i<=5;i++){ for(int j="1;j<=i;j++){" system.out.print(\'* \'); } system.out.println(); new line < pre> <p> <strong>Output:</strong> </p> <pre> * * * * * * * * * * * * * * * </pre> <p> <strong>Pyramid Example 2:</strong> </p> <p> <strong>PyramidExample2.java</strong> </p> <pre> public class PyramidExample2 { public static void main(String[] args) { int term=6; for(int i=1;i=i;j--){ System.out.print('* '); } System.out.println();//new line } } } </pre> <p> <strong>Output:</strong> </p> <pre> * * * * * * * * * * * * * * * * * * * * * </pre> <h2>Java for-each Loop</h2> <p>The for-each loop is used to traverse array or collection in Java. It is easier to use than simple for loop because we don't need to increment value and use subscript notation.</p> <p>It works on the basis of elements and not the index. It returns element one by one in the defined variable.</p> <p> <strong>Syntax:</strong> </p> <pre> for(data_type variable : array_name){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>ForEachExample.java</strong> </p> <pre> //Java For-each loop example which prints the //elements of the array public class ForEachExample { public static void main(String[] args) { //Declaring an array int arr[]={12,23,44,56,78}; //Printing array using for-each loop for(int i:arr){ System.out.println(i); } } } </pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> 12 23 44 56 78 </pre> <h2>Java Labeled For Loop</h2> <p>We can have a name of each Java for loop. To do so, we use label before the for loop. It is useful while using the nested for loop as we can break/continue specific for loop.</p> <h4>Note: The break and continue keywords breaks or continues the innermost for loop respectively.</h4> <p> <strong>Syntax:</strong> </p> <pre> labelname: for(initialization; condition; increment/decrement){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>LabeledForExample.java</strong> </p> <pre> //A Java program to demonstrate the use of labeled for loop public class LabeledForExample { public static void main(String[] args) { //Using Label for outer and for loop aa: for(int i=1;i<=3;i++){ bb: for(int j="1;j<=3;j++){" if(i="=2&&j==2){" break aa; } system.out.println(i+\' \'+j); < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 </pre> <p>If you use <strong>break bb;</strong> , it will break inner loop only which is the default behaviour of any loop.</p> <p> <strong>LabeledForExample2.java</strong> </p> <pre> public class LabeledForExample2 { public static void main(String[] args) { aa: for(int i=1;i<=3;i++){ bb: for(int j="1;j<=3;j++){" if(i="=2&&j==2){" break bb; } system.out.println(i+\' \'+j); < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 3 1 3 2 3 3 </pre> <h2>Java Infinitive for Loop</h2> <p>If you use two semicolons ;; in the for loop, it will be infinitive for loop.</p> <p> <strong>Syntax:</strong> </p> <pre> for(;;){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>ForExample.java</strong> </p> <pre> //Java program to demonstrate the use of infinite for loop //which prints an statement public class ForExample { public static void main(String[] args) { //Using no condition in for loop for(;;){ System.out.println('infinitive loop'); } } } </pre> <p> <strong>Output:</strong> </p> <pre> infinitive loop infinitive loop infinitive loop infinitive loop infinitive loop ctrl+c </pre> <p>Now, you need to press ctrl+c to exit from the program.</p> <h2>Java for Loop vs while Loop vs do-while Loop</h2> <table class="table"> <tr> <th>Comparison</th> <th>for loop</th> <th>while loop</th> <th>do-while loop</th> </tr> <tr> <td>Introduction</td> <td>The Java for loop is a control flow statement that iterates a part of the <a href="/java-programs-java-programming-examples">programs</a> multiple times. </td> <td>The Java while loop is a control flow statement that executes a part of the programs repeatedly on the basis of given boolean condition.</td> <td>The Java do while loop is a control flow statement that executes a part of the programs at least once and the further execution depends upon the given boolean condition.</td> </tr> <tr> <td>When to use</td> <td>If the number of iteration is fixed, it is recommended to use for loop.</td> <td>If the number of iteration is not fixed, it is recommended to use while loop.</td> <td>If the number of iteration is not fixed and you must have to execute the loop at least once, it is recommended to use the do-while loop.</td> </tr> <tr> <td>Syntax</td> <td>for(init;condition;incr/decr){ <br> // code to be executed <br> } </td> <td> while(condition){ <br> //code to be executed <br> } </td> <td> do{ <br> //code to be executed <br> }while(condition); </td> </tr> <tr> <td>Example</td> <td> //for loop <br> for(int i=1;i<=10;i++){ <br> System.out.println(i); <br> } </=10;i++){></td> <td> //while loop <br> int i=1; <br> while(i<=10){ <br> System.out.println(i); <br> i++; <br> } </=10){></td> <td> //do-while loop <br> int i=1; <br> do{ <br> System.out.println(i); <br> i++; <br> }while(i<=10); < td> </=10);></td></tr> <tr> <td>Syntax for infinitive loop</td> <td> for(;;){ <br> //code to be executed <br> }</td> <td> while(true){ <br> //code to be executed <br> }</td> <td> do{ <br> //code to be executed <br> }while(true); </td> </tr> </table> <hr></=3;i++){></pre></=3;i++){></pre></=5;i++){> Приклад піраміди 2:
PyramidExample2.java
public class PyramidExample2 { public static void main(String[] args) { int term=6; for(int i=1;i=i;j--){ System.out.print('* '); } System.out.println();//new line } } } Вихід:
* * * * * * * * * * * * * * * * * * * * *
Java для кожного циклу
Цикл foreach використовується для проходження масиву або колекції в Java. Його легше використовувати, ніж простий цикл for, тому що нам не потрібно збільшувати значення та використовувати нотацію підрядкового індексу.
Він працює на основі елементів, а не індексу. Він повертає елементи один за одним у визначеній змінній.
Синтаксис:
for(data_type variable : array_name){ //code to be executed } приклад:
ForEachExample.java
//Java For-each loop example which prints the //elements of the array public class ForEachExample { public static void main(String[] args) { //Declaring an array int arr[]={12,23,44,56,78}; //Printing array using for-each loop for(int i:arr){ System.out.println(i); } } } Перевірте зараз Вихід:
12 23 44 56 78
Java з позначкою для циклу
Ми можемо мати назву кожного циклу Java for. Для цього ми використовуємо label перед циклом for. Це корисно під час використання вкладеного циклу for, оскільки ми можемо розірвати/продовжити певний цикл for.
файли Linux
Примітка. Ключові слова break і continue розривають або продовжують внутрішній цикл for відповідно.
Синтаксис:
labelname: for(initialization; condition; increment/decrement){ //code to be executed } приклад:
LabeledForExample.java
перший нащадок css
//A Java program to demonstrate the use of labeled for loop public class LabeledForExample { public static void main(String[] args) { //Using Label for outer and for loop aa: for(int i=1;i<=3;i++){ bb: for(int j="1;j<=3;j++){" if(i="=2&&j==2){" break aa; } system.out.println(i+\' \'+j); < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 </pre> <p>If you use <strong>break bb;</strong> , it will break inner loop only which is the default behaviour of any loop.</p> <p> <strong>LabeledForExample2.java</strong> </p> <pre> public class LabeledForExample2 { public static void main(String[] args) { aa: for(int i=1;i<=3;i++){ bb: for(int j="1;j<=3;j++){" if(i="=2&&j==2){" break bb; } system.out.println(i+\' \'+j); < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 3 1 3 2 3 3 </pre> <h2>Java Infinitive for Loop</h2> <p>If you use two semicolons ;; in the for loop, it will be infinitive for loop.</p> <p> <strong>Syntax:</strong> </p> <pre> for(;;){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>ForExample.java</strong> </p> <pre> //Java program to demonstrate the use of infinite for loop //which prints an statement public class ForExample { public static void main(String[] args) { //Using no condition in for loop for(;;){ System.out.println('infinitive loop'); } } } </pre> <p> <strong>Output:</strong> </p> <pre> infinitive loop infinitive loop infinitive loop infinitive loop infinitive loop ctrl+c </pre> <p>Now, you need to press ctrl+c to exit from the program.</p> <h2>Java for Loop vs while Loop vs do-while Loop</h2> <table class="table"> <tr> <th>Comparison</th> <th>for loop</th> <th>while loop</th> <th>do-while loop</th> </tr> <tr> <td>Introduction</td> <td>The Java for loop is a control flow statement that iterates a part of the <a href="/java-programs-java-programming-examples">programs</a> multiple times. </td> <td>The Java while loop is a control flow statement that executes a part of the programs repeatedly on the basis of given boolean condition.</td> <td>The Java do while loop is a control flow statement that executes a part of the programs at least once and the further execution depends upon the given boolean condition.</td> </tr> <tr> <td>When to use</td> <td>If the number of iteration is fixed, it is recommended to use for loop.</td> <td>If the number of iteration is not fixed, it is recommended to use while loop.</td> <td>If the number of iteration is not fixed and you must have to execute the loop at least once, it is recommended to use the do-while loop.</td> </tr> <tr> <td>Syntax</td> <td>for(init;condition;incr/decr){ <br> // code to be executed <br> } </td> <td> while(condition){ <br> //code to be executed <br> } </td> <td> do{ <br> //code to be executed <br> }while(condition); </td> </tr> <tr> <td>Example</td> <td> //for loop <br> for(int i=1;i<=10;i++){ <br> System.out.println(i); <br> } </=10;i++){></td> <td> //while loop <br> int i=1; <br> while(i<=10){ <br> System.out.println(i); <br> i++; <br> } </=10){></td> <td> //do-while loop <br> int i=1; <br> do{ <br> System.out.println(i); <br> i++; <br> }while(i<=10); < td> </=10);></td></tr> <tr> <td>Syntax for infinitive loop</td> <td> for(;;){ <br> //code to be executed <br> }</td> <td> while(true){ <br> //code to be executed <br> }</td> <td> do{ <br> //code to be executed <br> }while(true); </td> </tr> </table> <hr></=3;i++){></pre></=3;i++){> Якщо ви використовуєте перервати bb; , це порушить лише внутрішній цикл, що є типовою поведінкою будь-якого циклу.
LabeledForExample2.java
public class LabeledForExample2 { public static void main(String[] args) { aa: for(int i=1;i<=3;i++){ bb: for(int j="1;j<=3;j++){" if(i="=2&&j==2){" break bb; } system.out.println(i+\' \'+j); < pre> <p> <strong>Output:</strong> </p> <pre> 1 1 1 2 1 3 2 1 3 1 3 2 3 3 </pre> <h2>Java Infinitive for Loop</h2> <p>If you use two semicolons ;; in the for loop, it will be infinitive for loop.</p> <p> <strong>Syntax:</strong> </p> <pre> for(;;){ //code to be executed } </pre> <p> <strong>Example:</strong> </p> <p> <strong>ForExample.java</strong> </p> <pre> //Java program to demonstrate the use of infinite for loop //which prints an statement public class ForExample { public static void main(String[] args) { //Using no condition in for loop for(;;){ System.out.println('infinitive loop'); } } } </pre> <p> <strong>Output:</strong> </p> <pre> infinitive loop infinitive loop infinitive loop infinitive loop infinitive loop ctrl+c </pre> <p>Now, you need to press ctrl+c to exit from the program.</p> <h2>Java for Loop vs while Loop vs do-while Loop</h2> <table class="table"> <tr> <th>Comparison</th> <th>for loop</th> <th>while loop</th> <th>do-while loop</th> </tr> <tr> <td>Introduction</td> <td>The Java for loop is a control flow statement that iterates a part of the <a href="/java-programs-java-programming-examples">programs</a> multiple times. </td> <td>The Java while loop is a control flow statement that executes a part of the programs repeatedly on the basis of given boolean condition.</td> <td>The Java do while loop is a control flow statement that executes a part of the programs at least once and the further execution depends upon the given boolean condition.</td> </tr> <tr> <td>When to use</td> <td>If the number of iteration is fixed, it is recommended to use for loop.</td> <td>If the number of iteration is not fixed, it is recommended to use while loop.</td> <td>If the number of iteration is not fixed and you must have to execute the loop at least once, it is recommended to use the do-while loop.</td> </tr> <tr> <td>Syntax</td> <td>for(init;condition;incr/decr){ <br> // code to be executed <br> } </td> <td> while(condition){ <br> //code to be executed <br> } </td> <td> do{ <br> //code to be executed <br> }while(condition); </td> </tr> <tr> <td>Example</td> <td> //for loop <br> for(int i=1;i<=10;i++){ <br> System.out.println(i); <br> } </=10;i++){></td> <td> //while loop <br> int i=1; <br> while(i<=10){ <br> System.out.println(i); <br> i++; <br> } </=10){></td> <td> //do-while loop <br> int i=1; <br> do{ <br> System.out.println(i); <br> i++; <br> }while(i<=10); < td> </=10);></td></tr> <tr> <td>Syntax for infinitive loop</td> <td> for(;;){ <br> //code to be executed <br> }</td> <td> while(true){ <br> //code to be executed <br> }</td> <td> do{ <br> //code to be executed <br> }while(true); </td> </tr> </table> <hr></=3;i++){> Інфінітив Java для циклу
Якщо ви використовуєте дві крапки з комою ;; у циклі for це буде інфінітивний цикл for.
Синтаксис:
for(;;){ //code to be executed } приклад:
ForExample.java
//Java program to demonstrate the use of infinite for loop //which prints an statement public class ForExample { public static void main(String[] args) { //Using no condition in for loop for(;;){ System.out.println('infinitive loop'); } } } Вихід:
infinitive loop infinitive loop infinitive loop infinitive loop infinitive loop ctrl+c
Тепер вам потрібно натиснути ctrl+c, щоб вийти з програми.
Java for Loop проти while Loop проти do-while Loop
| Порівняння | для циклу | цикл while | цикл do-while |
|---|---|---|---|
| вступ | Цикл Java for — це оператор потоку керування, який повторює частину програми кілька разів. | Цикл Java є оператором потоку керування, який виконує частину програм повторно на основі заданої логічної умови. | Цикл Java do while — це оператор потоку керування, який виконує частину програм принаймні один раз, а подальше виконання залежить від заданої логічної умови. |
| Коли використовувати | Якщо кількість ітерацій фіксована, рекомендується використовувати цикл for. | Якщо кількість ітерацій не фіксована, рекомендується використовувати цикл while. | Якщо кількість ітерацій не є фіксованою і ви повинні виконати цикл принаймні один раз, рекомендується використовувати цикл do-while. |
| Синтаксис | for(init;умова;incr/decr){ // код для виконання } | while(умова){ //код для виконання } | робити{ //код для виконання }while(умова); |
| приклад | //цикл for for(int i=1;i<=10;i++){ System.out.println(i); } | //цикл while int i=1; поки я<=10){ System.out.println(i); i++; } | // цикл do-while int i=1; робити{ System.out.println(i); i++; }поки я<=10); < td> |
| Синтаксис нескінченного циклу | для(;;){ //код для виконання } | while(true){ //код для виконання } | робити{ //код для виконання }while(true); |