The multiplication (*) operator produces the product of the operands.
The multiplication (*) operator produces the product of the operands.
console.log(3 * 4);
/ Expected output: 12
console.log(-3 * 4);
/ Expected output: -12
console.log("3" * 2);
/ Expected output: 6
console.log("foo" * 2);
/ Expected output: NaN
x * y
The * operator is overloaded for two types of operands: number and TypeError is thrown if one operand becomes a BigInt but the other becomes a number.
2 * 2; / 4
-2 * 2; / -4
Infinity * 0; / NaN
Infinity * Infinity; / Infinity
Other non-BigInt values are coerced to numbers:
"foo" * 2; / NaN
"2" * 2; / 4
2n * 2n; / 4n
-2n * 2n; / -4n
You cannot mix BigInt and number operands in multiplication.
2n * 2; / TypeError: Cannot mix BigInt and other types, use explicit conversions
2 * 2n; / TypeError: Cannot mix BigInt and other types, use explicit conversions
To do multiplication with a BigInt and a non-BigInt, convert either operand:
2n * BigInt(2); / 4n
Number(2n) * 2; / 4
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-multiplicative-operators |