The unary negation operator (-
) precedes its operand and negates it.
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Syntax
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) The definition of 'Unary negation operator' in that specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Unary negation (- ) | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 3 | Opera Full support 3 | Safari Full support 1 | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 | nodejs Full support 0.1.100 |
Legend
- Full support
- Full support