Lab04: HTML Form Validation + Factorial

1 files changed, 23 insertions, 0 deletions

diff --git a/Lab04/fact/script.js b/Lab04/fact/script.js
new file mode 100644
index 0000000..a8f397e
--- /dev/null
+++ b/Lab04/fact/script.js
@@ -0,0 +1,23 @@
+function factorial(n) {
+    if (n === 0) {
+        return 1;
+    }
+    return n * factorial(n - 1);
+}
+
+document.addEventListener("DOMContentLoaded", function () {
+    const button = document.getElementById("submitbutton");
+    const resultElement = document.getElementById("result");
+    const numberInput = document.getElementById("numberInput");
+
+    button.addEventListener("click", function () {
+        const input = parseInt(numberInput.value);
+
+        if (!isNaN(input) && input >= 0) {
+            const result = factorial(input);
+            resultElement.innerText = `The factorial of ${input} is equal to ${result}`;
+        } else {
+            resultElement.innerText = "Please enter a non-negative number.";
+        }
+    });
+});