correct square function parameter

Author: khalidbih

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

@@ -1,20 +1,29 @@
 
 // Predict and explain first BEFORE you run any code...
+// Function parameters must be variables, not numbers.
 
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
+// The code will give a SyntaxError because `3` is not a valid parameter name.
 
-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
-
+// The error happens because `3` is used as a parameter name.
+// Parameters must be variable names, not numbers.
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
+function square(number) {
+    return number * number;
+}
+console.log(square(3));
+