Exponentiation assignment (**=)

The exponentiation assignment operator (**=) raises the value of a variable to the power of the right operand.

Syntax

Operator: x **= y
Meaning:  x  = x ** y

Examples

Using exponentiation assignment

// Assuming the following variable
//  bar = 5

bar **= 2     // 25
bar **= 'foo' // NaN

Specifications

Specification
ECMAScript (ECMA-262)
The definition of 'Assignment operators' in that specification.

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See also