javascript-basics/swap2no.html at main · DEMiHAT/javascript-basics · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Swap Two Values</title>
</head>
<body>

<h2>Swap Two Values</h2>

<form>
    <label>Enter first value:</label><br>
    <input type="text" id="a" placeholder="Enter value A"><br><br>

    <label>Enter second value:</label><br>
    <input type="text" id="b" placeholder="Enter value B"><br><br>

    <input type="button" value="Swap" onclick="swapValues()">
</form>

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

<script>
    function swap(a, b) {
        let temp = a;
        a = b;
        b = temp;
        return [a, b];
    }

    function swapValues() {
        let a = document.getElementById("a").value;
        let b = document.getElementById("b").value;

        if (a === "" || b === "") {
            document.getElementById("result").innerHTML = "Please enter both values.";
            return;
        }

        let swapped = swap(a, b);

        document.getElementById("result").innerHTML =
            "After swapping:<br>Value A = " + swapped[0] + "<br>Value B = " + swapped[1];
    }
</script>

</body>
</html>