ABC of Programming
About Lesson

The while statement is a loop construct in programming that is used to execute a block of code as long as a specified condition is true. It’s useful when you don’t know the exact number of iterations you want to perform.

The syntax of the while statement is as follows:

while (condition) {
// code to be executed

Here’s what the syntax of the while statement means:

  • condition: This is the loop continuation condition. It is evaluated at the beginning of each iteration, and the loop continues as long as the condition is true.

Here’s an example of a while loop in Java that prints the numbers 0 to 9:

int i = 0;
while (i < 10) {

In this example, the loop continuation condition is i < 10. The loop will execute as long as i is less than 10. The loop counter variable i is initialized to 0 outside the loop, and it is incremented by 1 in each iteration of the loop.

The while loop is a simple and powerful loop construct that can be used in a variety of scenarios. For example, it can be used to read data from a file or a network socket until the end of the file or socket is reached. It can also be used in conjunction with a boolean flag to implement a simple state machine.

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