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Multiplication (*)

The * operator produces the product of the operands.

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Syntax

js
x * y

Description

The * operator is overloaded for two types of operands: number and BigInt. It first coerces both operands to numeric values and tests the types of them. It performs BigInt multiplication if both operands become BigInts; otherwise, it performs number multiplication. A TypeError is thrown if one operand becomes a BigInt but the other becomes a number.

Examples

Multiplication using numbers

js
2 * 2; // 4
-2 * 2; // -4

Multiplication with Infinity

js
Infinity * 0; // NaN
Infinity * Infinity; // Infinity

Multiplication with non-numbers

js
"foo" * 2; // NaN
"2" * 2; // 4

Multiplication using BigInts

js
2n * 2n; // 4n
-2n * 2n; // -4n

2n * 2; // TypeError: Cannot mix BigInt and other types, use explicit conversions

// To multiply a BigInt with a non-BigInt, convert either operand
2n * BigInt(2); // 4n
Number(2n) * 2; // 4

Specifications

Browser compatibility

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

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Multiplication