javascript-basics/max3.html at main · DEMiHAT/javascript-basics · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Maximum of Three Numbers</title>
</head>
<body>

<h2>Find the Maximum of Three Numbers</h2>

<form>
    <label>Enter first number:</label><br>
    <input type="number" id="num1" placeholder="Enter number 1"><br><br>

    <label>Enter second number:</label><br>
    <input type="number" id="num2" placeholder="Enter number 2"><br><br>

    <label>Enter third number:</label><br>
    <input type="number" id="num3" placeholder="Enter number 3"><br><br>

    <input type="button" value="Find Maximum" onclick="findMax()">
</form>

<p id="result"></p>

<script>
    function findMax() {
        let a = parseFloat(document.getElementById("num1").value);
        let b = parseFloat(document.getElementById("num2").value);
        let c = parseFloat(document.getElementById("num3").value);

        if (isNaN(a) || isNaN(b) || isNaN(c)) {
            document.getElementById("result").innerHTML = "Please enter all three numbers.";
            return;
        }

        let max = Math.max(a, b, c);
        document.getElementById("result").innerHTML = "The maximum number is: " + max;
    }
</script>

</body>
</html>