How to use JavaScript numbers and Boolean types

1. Numbers (number)

In JavaScript, integer values and floating-point values are not distinguished, and all numbers in JavaScript are represented by floating-point numbers.

Transformation:

Pareseint (...) converts a value to a number that does not successfully return Nan

Parsefloat (...) Converts a value to a floating-point number and does not successfully return Nan

Special values:

Nan, not a number. Can be judged using isNaN (num).

Infinity, infinitely large. Can be judged using isfinite (num).

2. Boolean Type (Boolean)

The Boolean type contains only true and false, unlike Python, where the first letter is not capitalized.

= = Compare equal

! = does not equal

= = = Comparison value and type are equal

！ = = = Not equal to

|| Or

&& and

How to use JavaScript numbers and Boolean types