Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

Comma Operator (,) (JavaScript)

Causes two expressions to be executed sequentially.

expression1, expression2

expression1

Any expression.

expression2

Any expression.

The , operator causes the expressions to be executed in left-to-right order. A common use for the , operator is in the increment expression of a for loop. For example:

j=25;
for (i = 0; i < 10; i++, j++)
{
   k = i + j;
}

The for statement allows only a single expression to be executed at the end of every pass through a loop. The , operator allows multiple expressions to be treated as a single expression, so both variables can be incremented.

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

Show:
© 2015 Microsoft