javascript - How to determine whether a value with decimals in js is equal to 0

Question

Is 0.05 equal to 0

Is 0.00 equal to 0

I use parseinit. . . Something went wrong

Answer 1

JavaScript does not strictly distinguish between decimals and integers, so you can directly determine whether they are equal, but it is best to use ===而不是==. Three equal signs are strictly equal. You can search on Baidu for specific differences

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0.000 is of course equal to 0

Answer 2

Just use it===and it’ll be fine

0.000 === 0 // true

0.08 === 0 // false

Answer 3

You have to pay attention to the error in decimals. It is best to provide an accuracy judgment, such as Math.abs(a) < 0.0000001

Math.abs(0.1 + 0.2 - 0.3) < 0.0000001 // true
0.1 + 0.2 - 0.3 === 0 // false

Answer 4

parseint is converted to plastic. Think about it, what is 0.05 converted to plastic?