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Unary negation (-)

The unary negation operator (-) precedes its operand and negates it.

Try it

Syntax

-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

Browser compatibility

Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet Deno Node.js
Unary_negation
1
12
1
3
3
1
4.4
18
4
10.1
1
1.0
1.0
0.10.0

See also

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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Unary_negation