JS does not use the intermediate variable temp to realize that two variables are worthy of exchange implementation code

This article mainly introduces to you how to realize the exchange of two variables without using the intermediate variable temp in JS. Friends who need it can refer to it. I hope it can help everyone.

1. Use addition and subtraction;

var a=1; var b=2; a=a+b; b=a-b; a=a-b;

2. Use multiplication and division (multiplication and division are more Like the mapping of addition and subtraction to multiplication and division operations)

var a=1; var b=2; a = a * b; b = a / b; a = a / b;

Note: This method can exchange variables with integer and floating-point values, but when dealing with floating-point There may be a loss of precision when using point types, and b cannot be 0 during multiplication and division;

3. Flexibility of using arrays

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var a=1; var b=2; a=[b,b=a][0];

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