JavaScript Number parseFloat() method

The JavaScript number parseFloat() method parses a string argument and converts it into a floating point number. It returns NaN, if the first character of given value cannot be converted to a number.

Syntax

The parseFloat() method is represented by the following syntax:

Parameter

string – It represents the string to be parsed.

Return

A floating point number parsed from the given value.

JavaScript Number parseFloat() method example

Here, we will understand parseFloat() method through various examples.

Example 1

Let’s see a simple example of parseFloat() method.

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Output:

50  50.25  NaN  50  50.25  

Example 2

Let’s see an example to add two strings with and without using parseFloat() method.

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Output:

Before invoking parseFloat(): 10.4520.55  After invoking parseFloat(): 31