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Javascript: parseInt

parseInt creates an integer from a String.

<!DOCTYPE html>
<html>
<head>
  <meta content="text/html;charset=utf-8" http-equiv="Content-Type">
  <title>parseInt</title>

  <script type="text/javascript">
    
    function main() {

      var out = document.getElementById('out');

      out.innerHTML  = parseInt('42xyz'        ) + '<br>'; // 42
      out.innerHTML += parseInt('   42xyz'     ) + '<br>'; // 42
      out.innerHTML += parseInt('abc42xyz'     ) + '<br>'; // NaN
      out.innerHTML += parseInt(' 100    '     ) + '<br>'; // 100
      out.innerHTML += parseInt('0100    '     ) + '<br>'; // 100
      out.innerHTML += parseInt('011     '     ) + '<br>'; // 100
      out.innerHTML += parseInt('0x100   '     ) + '<br>'; // 256
      out.innerHTML += parseInt('  100   ' , 16) + '<br>'; // 256
      out.innerHTML += parseInt('deadbeef'     ) + '<br>'; // NaN
      out.innerHTML += parseInt('deadbeef' , 16) + '<br>'; // 3735928559

    }

  </script>

</head>
<body onload='main()';>
  <div id='out'>
  </div>
</body>
</html>

Github repository about-javascript, path: /objects/Global-Object/function-properties/parseInt.html

Javascript: parseInt

See also