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Number() function with example in JavaScript

JavaScript Number() function: Here, we are going to learn about the Number() function with example in JavaScript.
Submitted by IncludeHelp, on February 02, 2019

JavaScript Number() function

Number() function is a predefined global function in JavaScript, it used to convert an object to the number. If the function is not able to convert the object in a number – it returns "NaN". (Read more: NaN in JavaScript).

Note:

  • If we convert Boolean values to the number, Number() function returns 0 or 1.
  • If we convert a date object to the number, Number() function returns value in milliseconds.

Example

<html> <head> <title>JavaScipt Example</title> </head> <body> <script> var a = "10"; var b = "10 20"; var c = "1234 Hello"; var d = "Hello 1234"; var e = true; var f = new Date(); //converting values to number using Number() function document.write("Number(a) = " + Number(a) + "<br>"); document.write("Number(b) = " + Number(b) + "<br>"); document.write("Number(c) = " + Number(c) + "<br>"); document.write("Number(d) = " + Number(d) + "<br>"); document.write("Number(e) = " + Number(e) + "<br>"); document.write("Number(f) = " + Number(f) + "<br>"); </script> </body> </html>

Output

Number(a) = 10
Number(b) = NaN
Number(c) = NaN
Number(d) = NaN
Number(e) = 1
Number(f) = 1549128507537

JavaScript Built-in Functions »


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