Mathematical Operations

Appying a basic mathemeatical operation (+,-,*,/, and reminder after division %) in JavaScript is very strainforward.
A JavaScript program shown here illustrates how to multiply two numbers entered by the user:

	<!DOCTTYPE html> 

	<!--Example 1: Promt2.html --> 

		<html> 

			<head> 

				<title> Prompt the user to enter two entries </title> 

				<script > 

				<!-- 

				
				//read the first number as a string 

				firstentry = window.prompt('Enter the first number');

				//read the second number as a string 

				secondentry = window.prompt('Enter the second number');

				//convert strings to numbers

				number1=parseInt(firstentry); 

				number2=parseInt(secondentry);

				mult = number1* number2; //multiplying the two numbers

				//show he result

				document.writeln('<h2> The multiplication is ' + mult + '</h2>'); 

				// --> 

				</script> 

			</head> 

			<body></body> 

		</html>
Note that any entry is first interpreted as a string, and if it's a number it needs to be converted into a number as shown in this program.
First, the user is prompted to enter two numbers:

Then multiplicatiopn is shown as under:


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Date of last modification: March 26, 2019.