Predict and explain error. Fix by giving adding variable name to parameter and giving default value

Author: MahirShah300

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

@@ -1,20 +1,26 @@
-
 // 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
+// In the function, 3 hasn't been assigned to num, so num is NaN and should return NaN.
+//Also when defining a function, the parameter should have the variable name, not a value
+//to pass in, unless you want to default value such as num = 3, which assigns 3 to num if
+// no value is passed in
 
-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
-
+//syntaxError means there is a mistake in the way the code is written, so javascript can't
+// interpret the code. in this case there is a number here when there shouldn't be.
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
-
+function square(num = 3) {
+  return num * num;
+}