Unary negation (-)
The unary negation operator (-) precedes its operand and negates it.
语法
Operator: -x
Examples
Negating numbers
const x = 3;
const y = -x;
// y = -3
// x = 3
Negating non-numbers
The unary negation operator can convert a non-number into a number.
const x = "4";
const y = -x;
// y = -4
Specifications
| Specification |
|---|
| ECMAScript (ECMA-262) Unary negation operator |
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