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Chapter 4: Arithmetic Operations in JavaScript

 

 

4.1 Arithmetic in JavaScript

JavaScript is not just a scripting language, it can also perform arithmetic calculations! Best of all, it can interact with online users by receiving data from them, operate on the data dan then display the outputs to the users. The four basic arithmetic operators in JavaScript is just the same as in VB, namely

Addition +
Subtraction -
Multiplication x
Division /

 

Lets construct our first arithmetic program in JavaScript. You can either use a text editor such as notepad to type in the statements or you can use Microsoft Frontpage or Dreamweaver to do the job. Now, type in the following lines of statements.

<HTML>

<HEAD>

<Script Language="JavaScript">


var           Number1, // this is the first string input by the user
               Number2 , // this is the second string input by the user
               Num1 , // numeric value converted from Number1
               Num2, // numeric value converted from Number2
               sum,
               difference ,
               product,
               quotient;
               Number1=window.prompt("Enter your first Integer","0");
               Number2=window.prompt("Enter your second integer","0");
               Num1=parseInt(Number1);
               Num2=parseInt(Number2);
               sum=Num1+Num2;
               difference=Num1-Num2;
               product=Num1*Num2;
               quotient=Num1/Num2;
               document.writeln(Number1+"+"+Number2+"="+sum+"<BR>");
               document.writeln(Number1+"-"+Number2+"="+difference+"<BR>");
               document.writeln(Number1+"x"+Number2+"="+product+"<BR>");
               document.writeln(Number1+"/"+Number2+"="+quotient);

</Script>

 


Click Testing Page to view the output
 

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