do...while

The do...while statement creates a loop that executes a specified statement until the test condition evaluates to false. The condition is evaluated after executing the statement, resulting in the specified statement executing at least once.

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Syntax

do
   statement
while (condition);

statement

A statement that is executed at least once and is re-executed each time the condition evaluates to true. To execute multiple statements within the loop, use a block statement ({ ... }) to group those statements.

condition

An expression evaluated after each pass through the loop. If condition evaluates to true, the statement is re-executed. When condition evaluates to false, control passes to the statement following the do...while.

Examples

Using do...while

In the following example, the do...while loop iterates at least once and reiterates until i is no longer less than 5.

HTML content

<div id="example"></div>

JavaScript content

var result = '';
var i = 0;
do {
   i += 1;
   result += i + ' ';
} while (i < 5);
document.getElementById('example').innerHTML = result;

Result

Specifications

Browser compatibility

See also

• while
• for