The while Statement

The while Statement

üThe while statement has the following syntax:

while is a

reserved word

while (condition)

    statement;

If the condition is true, the statement is executed.

Then the condition is evaluated again.

The statement is executed repeatedly until

the condition becomes false.

Logic of a while Loop

Note that if the condition of a while statement is false initially, the statement is never executed. Therefore, the body of a while loop will execute zero or more times.

while Loop Example

final int LIMIT = 5;

int count = 1;

while (count <= LIMIT) {

    System.out.println(count);

    count += 1;

}

Infinite Loops

üThe body of a while loop eventually must make the condition false.

üIf not, it is an infinite loop.

Nested Loops

üSimilar to nested if statements, loops can be nested as well

üThat is, the body of a loop can contain another loop

üEach time through the outer loop, the inner loop goes through its full set of iterations