Subtraction assignment (-=)
尝试一下
The subtraction assignment operator (-=
) subtracts the value of the right operand from a variable and assigns the result to the variable.
语法
Operator: x -= y Meaning: x = x - y
Examples
Using subtraction assignment
// Assuming the following variable
// bar = 5
bar -= 2 // 3
bar -= 'foo' // NaN
Specifications
Specification |
---|
ECMAScript (ECMA-262) Assignment operators |
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