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    • Home
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    Javascript – Number function

    on Aug 30, 2016

    The Number JavaScript object is a wrapper object allowing you to work with numerical values. A Number object is created using the Number() constructor. It can also be used to detect if a String is valid number.

    Example – Number() returning valid number

    <script>
      document.write(Number("123") + "<br>");
      document.write(Number("12.3") + "<br>");
      document.write(Number("") + "<br>");
      document.write(Number("0x11") + "<br>"); // hex
      document.write(Number("0o11") + "<br>");  // octal
    </script>
    refresh done
    try it online

    Example – Number() returning NaN

    <script>
      document.write(Number("foo") + "<br>");
      document.write(Number("100a") + "<br>");
    </script>
    refresh done
    try it online

    Suggested posts:

    1. Javascript – parseInt
    2. Javascript – check if string is number
    3. How to print javascript object to log
    4. jQuery – get javascript object
    5. Javascript arrow function examples
    6. Javascript parse json string
    7. Are Javascript functions objects?
    8. Javascript – print all methods of an object
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    Posted in Tutorials | Tagged Javascript, Javascript cookbook, Tutorials

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