乘法赋值 (*=)

¥Syntax

x *= y

¥Description

x *= y 与 x = x * y 等效，只是表达式 x 仅计算一次。

¥x *= y is equivalent to x = x * y, except that the expression x is only evaluated once.

¥Examples

¥Multiplication assignment using numbers

let bar = 5;
bar *= 2; // 10

其他非 BigInt 值被强制转换为数字：

¥Other non-BigInt values are coerced to numbers:

let bar = 5;
bar *= "foo"; // NaN

¥Multiplication assignment using BigInts

let foo = 3n;
foo *= 2n; // 6n
foo *= 1; // TypeError: Cannot mix BigInt and other types, use explicit conversions

¥See also

• JS 指南中的赋值运算符
• 乘法（*）