Complete error exercise 2 - square parameter

Author: salahalsabhi

Sprint-3/1-key-errors/2.js

@@ -1,20 +1,29 @@
-
 // Predict and explain first BEFORE you run any code...
-
 // this function should square any number but instead we're going to get an error
-
 // =============> write your prediction of the error here
+// Prediction: SyntaxError — you cannot use a number literal (3) as a parameter name.
+// Parameter names must be valid identifiers (e.g. num), not values.
+// The value 3 should be passed when calling the function, not in the definition.
 
-function square(3) {
-    return num * num;
-}
+//function square(3) {
+//return num * num;
+//}
 
 // =============> write the error message here
+// SyntaxError: Unexpected number
+// (exact wording can vary slightly by Node version, e.g. "Missing formal parameter")
 
 // =============> explain this error message here
+// In a function definition, the parentheses list parameter names (placeholders).
+// 3 is a value (argument), not a name, so JavaScript rejects it while parsing the file.
+// Even if that were fixed, num is not defined in the original code — the parameter
+// and the name used inside the function must match.
 
 // Finally, correct the code to fix the problem
-
 // =============> write your new code here
+function square(num) {
+  return num * num;
+}
 
+console.log(square(3));