A brief analysis of floating point arithmetic problems in js_javascript skills

How are floating point operations performed in js?

For example: var a=0.69;

I want to get 6.9 by writing var c=a*10;

alert(c); The result is: 6.8999999999999995

After searching online, some netizens said that this is a JS floating point calculation bug and found a solution:

Method 1: Have js custom function

Copy code Code As follows:

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