How to use while statement in java

The while loop in Java is a loop statement that continuously executes a block of statements until a condition is false. Specific execution process: 1. Check whether the condition is true. 2. If true, execute the statement block. 3. If false, break out of the loop. 4. Regardless of whether the statement block is executed or not, the condition is checked again. 5. Repeat this process until the condition is false.

While loop statement in Java

Usage of while statement

## The

#while statement is a loop statement that continues to execute its block of statements until its condition is false. The syntax is as follows:

<code class="java">while (condition) {
    // 语句块
}</code>

where:

• condition is a Boolean expression that determines whether the loop continues execution. If the condition is true, the block of statements will execute.
• Statement block is the code block to be executed inside the while loop.

The execution process of while loop

Check conditions. If the condition is true, the block of statements is executed.
1. If the condition is false, break out of the loop.
2. Regardless of whether the statement block is executed or not, the condition will be checked again. The process repeats until the condition is false.

Application scenarios of while loop

when loop is usually used in situations where an operation needs to be repeatedly performed, for example:

Traverse an array or collection
• Continuously read user input
• Repeatedly try an operation until a condition is met

Example

The following code uses a while loop to traverse an array and print each element:

<code class="java">int[] numbers = {1, 2, 3, 4, 5};
int i = 0;
while (i < numbers.length) {
    System.out.println(numbers[i]);
    i++;
}</code>

Output:

<code>1
2
3
4
5</code>

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