replace numeric parameter 3 with valid name num

Author: remimarcelle

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

@@ -4,17 +4,28 @@
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
+// I predict that I will get a SyntaxError as a parameter cannot
+// be a Number, parameters must be valid variable names.
 
-function square(3) {
-    return num * num;
-}
+// function square(3) {
+//     return num * num;
+// }
 
-// =============> write the error message here
+// =============> write the error message here: 
+// SyntaxError: Unexpected number
 
 // =============> explain this error message here
+// Function parameters must be valid variable names, they must 
+// follow the same naming rules. a number like 3 is not a valid
+// parameter name. 
+// TO fix the code, rename the parameter to num (or any valid variable
+// name) and use it in the return statement.)
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
+function square(num) {
+    return num * num;
+}
 
-
+console.log(square(3)); // This should now work and output 9