Addition, Subtraction, Division, and Multiplication in Java Script. Below are some Java Script examples to perform arithmetic operations. In example 1, we will create a simple GUI application to perform arithmetic operations using HTML and JS. In other example, you will see arithmetic operations with the console.

JS program to perform all arithmetic operations

Steps

Take user input
Use function Calc()
Print result

Program to perform all arithmetic operations in JS using textbox

<!DOCTYPE html>
<html>
<head>
    <title>Javscript Calculate</title>
    <meta charset="windows-1252">\

    <script>
        function calc()
        {
            var n1 = parseFloat(document.getElementById('n1').value);
            var n2 = parseFloat(document.getElementById('n2').value);
            var oper = document.getElementById('operators').value;

            if (oper === '+') 
            {
                 document.getElementById('result').value=n1+n2;
            }
            if (oper === '-') 
            {
                 document.getElementById('result').value=n1-n2;
            }
            if (oper === '/') 
            {
                 document.getElementById('result').value=n1/n2;
            }
            if (oper === '*') 
            {
                 document.getElementById('result').value=n1*n2;
            }
        }
    </script>
</head>
<body>
    <input type="text" id="n1"/><br/><br/>
    <input type="text" id="n2"/><br/><br/>

    <select id="operators">
        <option value="+">+</option>
        <option value="-">-</option>
        <option value="/">/</option>
        <option value="*">*</option>
    </select>

    <button onclick="calc();">=</button>
    <input type="text" id="result"/>
</body>
</html>

Output

Program to perform all asthmatic operations using JS functions

<!DOCTYPE html>
<html>
<head>
    <title>ARITHMATIC OPERATIONS</title>
</head>
<body>
<script>
    //addition
    var a = 100;
    var b = a + 200 +100;
    //alert(b);

    //substraction
    var c = 100 - 50;
    //alert (c);

    //multiplication
    var m = c * 10;
    //alert (m);

    //division
    var d = 500 / 2;
    alert(d);

    //mix
    var combo = 100 + 50 / 2 + 10;
    //alert (combo);
</script>
</body>
</html>

Output

In this way, we learned how to perform arithmetic operations in JS.