Subtraction Assignment Operator (-=) (JavaScript)

Subtracts the value of an expression from the value of a variable and assigns the result to the variable.

Syntax


result -= expression  

Parameters

result
Any numeric variable.

expression
Any numeric expression.

Remarks

Using the -= operator is exactly the same as doing the following:

result = result - expression  

Requirements

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.

See Also

Subtraction Operator (-)
Operator Precedence
Operator Summary (JavaScript)