Java for Loop

In this tutorial, we will learn how to use for loop in Java with the help of examples.

In computer programming, loops are used to repeatedly execute a block of statements. For example, if you want to print message 100 times, then rather than typing the same code 100 times, you can use a loop.

There are three types of loops in Java:

1. for loop

2. while loop

3. do-while loop

Java for Loop

In java for loop is used to run a block of code for a certain number of times. It is particularly used in cases where the number of iterations is fixed.

The for statement consumes the initialization, condition and increment/decrement in one line thereby providing a shorter, easy to debug structure of looping.

Syntax:

for(initialization expr; condition expr; update exp){
// body of the loop
// statement or code to be executed
}

Example:

// Java program to print number form 1 to 10

class Simple{
    public static void main(String args[]){

    for(int i = 1; i <= 10; i++){
        System.out.println(i);
    }
    }
}

Output:

1

2

3

4

5

6

7

8

9

10

Example 2: Display a Coder Ten Times

class Simple{
    public static void main(String args[]){

    for(int i = 1; i <= 10; i++){
        System.out.println("Coder");
    }
    }
}

Output:

Coder

Coder

Coder

Coder

Coder

Coder

Coder

Coder

Coder

Coder

Java Infinite For Loop

If we set the test expression in such a way that it never evaluates to false, the for loop will run forever. This is called infinite for loop.

Example:

// Infinite for Loop

class Simple{
    public static void main(String args[]){

    for(int i = 0; i <= 1; i--){
        System.out.println(i);
    }
    }
}

Output:

0

-1

-2

-3

-4

-5

-6

-7

.

.

.

ctrl+c

Note: ctrl+c is used for stop the execution of this program and exit form the program.