Do you know how to compare numerical values ​​in js?

The var type defined in JavaScript is a weak type, and the default is String type. When comparing the size of two numbers, the default comparison is two strings

You cannot directly use ">" and "<" in js to directly determine the size

For example, when comparing 10 and 2, compare 10 by number It is greater than 2, but when compared according to the default string comparison, the first 1 and the first 2 are compared to 2, which will cause the phenomenon that 2 is greater than 10.

So when comparing the sizes of two numbers in javascript, you need to convert the types before comparing.

For example:

if(3>4) should be written as

 if(eval(3)>eval(4))
 
var n=4;

if(n>3) should be written as

if(parseInt(n)>eval(3)）
 
var n=4;

if(3

if(eval(3)<parseInt(n)&&parseInt(n)<eval(5)）

Thank you all for reading, I hope you will benefit from it.

This article is reproduced from: https://blog.csdn.net/CPLASF_001/article/details/89455277

Recommended tutorial: "JS Tutorial"

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