Multiplication (*)
BaselineWidely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Themultiplication (*) operator produces the product of the operands.
Try it
console.log(3 * 4);// Expected output: 12console.log(-3 * 4);// Expected output: -12console.log("3" * 2);// Expected output: 6console.log("foo" * 2);// Expected output: NaNSyntax
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x * yDescription
The* operator is overloaded for two types of operands: number andBigInt. It firstcoerces 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. ATypeError is thrown if one operand becomes a BigInt but the other becomes a number.
Examples
Multiplication using numbers
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2 * 2; // 4-2 * 2; // -4Infinity * 0; // NaNInfinity * Infinity; // InfinityOther non-BigInt values are coerced to numbers:
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"foo" * 2; // NaN"2" * 2; // 4Multiplication using BigInts
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2n * 2n; // 4n-2n * 2n; // -4nYou cannot mix BigInt and number operands in multiplication.
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2n * 2; // TypeError: Cannot mix BigInt and other types, use explicit conversions2 * 2n; // TypeError: Cannot mix BigInt and other types, use explicit conversionsTo do multiplication with a BigInt and a non-BigInt, convert either operand:
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2n * BigInt(2); // 4nNumber(2n) * 2; // 4Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-multiplicative-operators |