Course Content
Introduction to JavaScript
do while
Consider the do-while loop. This loop is similar to the while loop but has a difference.
while | do-while |
Executes code block after the conditional checking. | Executes code block before the conditional checking. |
Syntax
The do-while loop starts with the do
keyword, includes the code block ({}
), and ends with the while
keyword followed by the condition (()
) without the code block:
At the start, the variable a
was equal to 0
, but the condition a >= 1
was checked after the a = a + 1
operation.

The do code block is always executed at least once:
Note
The end of the command (
;
) after thedo
code block will result in aSyntaxError
.
Section 5.
Chapter 2