Display type conversion in JS

This time I will bring you the display type conversion in JS , what are the precautions for display type conversion in JS, the following is a practical case, let's take a look.

Number(), convert things into numeric types

parseInt(string, radix), convert strings into integers in the corresponding base system

parseFloat(string, radix), convert the string into a floating point number in the corresponding base system

Convert things into string type, undefined and null can be converted into string form

Convert things into string types, undefined and null cannot be used, radix is ​​based on decimal and converted into the target base

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