Post
Ask Question

Learn JavaScript Part 5: Number() Function

Number function converts object value to number.
  1. Learn<!DOCTYPE html>  
  2. <html xmlns="http://www.w3.org/1999/xhtml">  
  3. <head>  
  4.     <title></title>  
  5. </head>  
  6. <body>  
  7.     <script id="javascript">  
  8.     var value=prompt("what is your age?","");  
  9.     alert(value+7);  
  10.   
  11.     var num= Number(value);  
  12.     alert(num+7);  
  13.     </script>  
  14. </body>  
  15. </html> 
User Input

What is your age?

34

Output

347 (Before conversion)

41 (After Conversion)