JavaScript Program to subtract of two numbers

By: Koushik

Created: 03/15/2023 08:13

Last modified: 03/15/2023 08:13

Program

<!DOCTYPE html>
<html>
<head>
<title>Subtract Two Numbers</title>
<script>
function calculateSub()
{
	var a = document.getElementById("firstNum").value;
	var b = document.getElementById("secondNum").value;
	var sub = parseInt(a) - parseInt(b);
	document.getElementById("result").innerHTML = sub;
}
</script>
</head>
<body>
	<h2>Subtract two numbers</h2>
	<label>Enter the value of a: </label><input type="number" id="firstNum" name="firstNum" /><br>
	<label>Enter the value of b: </label><input type="number" id="secondNum" name="secondNum" /><br>
	<button type="button" onClick="calculateSub()">Subtract</button>
	<p>Result: <span id="result" style="color: red;"></span></p>
</body>
</html>

Output

<p class="output">Subtract two numbers</p>
<label>Enter the value of a: </label><input type="number" id="firstNum" name="firstNum" /><br><label>Enter
    the value of b: </label><input type="number" id="secondNum" name="secondNum" /><br>
<button type="button" onClick="calculateSub()">Subtract</button>
<p>
    Result: <span id="result" style="color: red;"></span>
</p>
<script>
function calculateSub() {
    var a = document.getElementById("firstNum").value;
    var b = document.getElementById("secondNum").value;
    var sub = parseInt(a) - parseInt(b);
    document.getElementById("result").innerHTML = sub;
}
</script>

JavaScript Program to subtract of two numbers

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