Java While Loop

The while loop in Java is a control structure that repeatedly executes a block of code as long as a specified condition is true. It is often used when you don’t know in advance how many times the loop will need to execute. Here’s the basic syntax of the while loop in Java:

while (condition) {
    // Code to repeat
}

• The condition is evaluated before each iteration of the loop. If the condition is true, the loop continues; if it’s false, the loop terminates.
• The code inside the while loop is executed as long as the condition remains true.

Here’s an example of using a while loop to print numbers from 1 to 5:

public class Main {
    public static void main(String[] args) {
        int i = 1;
        while (i <= 5) {
            System.out.println(i);
            i++; // Increment the loop control variable
        }
    }
}

In this example:

• int i = 1 initializes the loop control variable i to 1 before entering the loop.
• i <= 5 is the condition, specifying that the loop will continue as long as i is less than or equal to 5.
• i++ increments the loop control variable i by 1 after each iteration.

The loop will execute five times, printing the numbers 1 to 5.

You can use the while loop for situations where you need to repeat a block of code until a specific condition is no longer met. It’s particularly useful when the number of iterations is not known in advance and is determined by the condition. Just be cautious to ensure that the condition will eventually become false to avoid infinite loops.