How to get numeric value from a prompt box? [duplicate]

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parseInt() or parseFloat() are functions in JavaScript which can help you convert the values into integers or floats respectively.

Syntax:

 parseInt(string, radix);
 parseFloat(string);
  • string: the string expression to be parsed as a number.
  • radix: (optional, but highly encouraged) the base of the numeral system to be used – a number between 2 and 36.

Example:

 var x = prompt("Enter a Value", "0");
 var y = prompt("Enter a Value", "0");
 var num1 = parseInt(x);
 var num2 = parseInt(y);

After this you can perform which ever calculations you want on them.

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