Fixed factorial code formatting

Author: Sruthi U

factorial.js

@@ -1,17 +1,16 @@
-
 // Function to calculate factorial
 
 function factorial(n) {
-    if (!Number.isInteger(n) || n < 0) {
-        throw new Error("Enter a non-negative integer");
-    }
+  if (!Number.isInteger(n) || n < 0) {
+    throw new Error('Enter a non-negative integer')
+  }
 
-    if (n === 0 || n === 1) {
-        return 1;
-    }
+  if (n === 0 || n === 1) {
+    return 1
+  }
 
-    return n * factorial(n - 1);
+  return n * factorial(n - 1)
 }
 
 // Example usage
-console.log(factorial(5)); // Output: 120
+console.log(factorial(5)) // Output: 120