Fix function definition and error explanations in square function example

Author: Payman IB

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

@@ -4,17 +4,21 @@
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
+// line 9 num is not defined.
 
-function square(3) {
-    return num * num;
-}
+// function square(3) {
+//    return num * num;
+//}
 
 // =============> write the error message here
-
+// SyntaxError: Unexpected number
 // =============> explain this error message here
-
+// 3 is not a variable for the function to use. It should be a variable name like num or n.
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
-
+function square(num) {
+    return num * num;
+}
+console.log(square(3));