JavaScript Reference/Javascript Methods/parseInt

"parseInt()" Example

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<html> <body> <button onclick="alert(parseInt("12.34"));">Number</button> <button onclick="alert(parseInt("Hello"));">NaN</button> </body> </html>

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Note: Converts the string to an integer. Returns an integer if value supplied is numeric or NaN if value supplied is not numeric.

Syntax:

parseInt(param1) Parameters:

   param1   Required; the string to be evaluated.
   
     
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