The Literials of Number Type

JavaScript uses the IEEE-754 format to represent both integers and floating-point values.

Decimal Integer

The literal format of a decimal integer can be entered directly:

 
<!DOCTYPE html>
<html>
<head>
    <title>Number Example</title>
    <script type="text/javascript">
          
       var intNum = 123; //integer 
              
    </script>

</head>
<body>
  
</body>
</html>
Click to view the demo

Integers can be represented as either octal (base 8) or hexadecimal (base 16) literals.

Home 
  JavaScript Book 
    Language Basics  

Data Types:
  1. JavaScript Data Types
  2. typeof Operator
  3. The Undefined Type
  4. null Type
  5. null vs undefined
  6. Boolean Type
  7. Boolean() casting function
  8. The Literials of Number Type
  9. Octal Integer
  10. Hexadecimal
  11. Floating-Point Values
  12. Value range
  13. NaN
  14. Number Conversions:Number(), parseInt() and parseFloat()
  15. Number() function
  16. parseInt()
  17. parseFloat()
  18. The String Type
  19. String Literals and Escapes
  20. Get the String Length
  21. Converting to a String with toString() method
  22. Convert Number to String with radix
  23. Convert to String with String() casting function