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What is the difference between parseInt(string) and Number(string) in JavaScript has been asked previously.
But the answers basically focused on the radix and the ability of parseInt to take a string like "123htg" and turn it into 123.
What I am asking here is if there is any big difference between the returns of Number(...) and parseFloat(...) when you pass it an actual number string with no radix at all.
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The Number. parseFloat() method parses an argument and returns a floating point number. If a number cannot be parsed from the argument, it returns NaN .
The parseFloat() function is used to accept a string and convert it into a floating-point number. If the input string does not contain a numeral value or If the first character of the string is not a number then it returns NaN i.e, not a number.
parseInt is for converting a non integer number to an int and parseFloat is for converting a non float (with out a decimal) to a float (with a decimal). If your were to get input from a user and it comes in as a string you can use the parse method to convert it to a number that you can perform calculations on.
The parseFloat() function parses an argument (converting it to a string first if needed) and returns a floating point number.
The internal workings are not that different, as @James Allardic already answered. There is a difference though. Using parseFloat, a (trimmed) string starting with one or more numeric characters followed by alphanumeric characters can convert to a Number, with Number that will not succeed. As in:
parseFloat('3.23abc'); //=> 3.23 Number('3.23abc'); //=> NaN In both conversions, the input string is trimmed, by the way:
parseFloat(' 3.23abc '); //=> 3.23 Number(' 3.23 '); //=> 3.23 If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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