The JavaScript parseFloat() method parses a value as a string and returns the first number. If the first character in the string cannot be converted, NaN is returned.

<!-- html element to place output -->
<p id="my_output"></p>

Example 1:

// variable
let my_string = parseFloat('I am 54 years old!');

// output to the HTML element
document.getElementById('my_output').innerHTML = my_string;

Example 2:

// variable
let my_string = parseFloat('54 years old I am!');

// output to the HTML element
document.getElementById('my_output').innerHTML = my_string;

Example 1:

NaN

Example 2:

54

parseFloat(value)

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