What is parseFloat() in JavaScript?

The parseFloat() function takes a string as input, converts it to float, and returns the result.

Syntax

parseFloat(string)

Parameter

The only parameter for this function is a string.

Return value

The function returns a floating-point number that is parsed from the string.

  • Only the first number is converted to float and returned if the string has more than one number separated by a space.
  • Extra spaces at the beginning and the end are ignored.
  • Any alphabets are ignored if they are at the end.
  • NaN is returned if the first non-whitespace character cannot be turned to float.

Code

console.log( parseFloat("56.019") )
console.log( parseFloat("    56.019   abc") )
console.log( parseFloat("57") )
console.log( parseFloat("68.9 55") )
console.log( parseFloat("abc 56.019") )

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