Numbers

Number()

Convert a string to a number.

Sometimes it returns integer. Other times it returns a float. And if you pass in a string with random text in it, you’ll get NaN, an acronym for Not a Number.

As a result of this inconsistency, it’s generally safer to use parseInt() or parseFloat(). If you know the format of the number you’d like, use those instead. If you want the string to fail with NaN if it has other characters in it, though, Number() may actually be a better choice.

// returns 123
Number('123');

// returns 12.3
Number('12.3');

// returns NaN
Number('3.14someRandomStuff');