Predicted and answered 2.js in errors (and formatted 0.js)

Author: habohlin

Sprint-3/1-key-errors/0.js

@@ -25,4 +25,4 @@ function capitalise(str) {
   str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
-console.log(capitalise("hellllo"));
+console.log(capitalise("hellllo"));

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

@@ -1,20 +1,38 @@
-
 // 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
+// Answer: I predict that we will get a Reference Error: num is not defined. Or perhaps an error about the 3, as
+// it is a number and therefore not a valid parameter name. I believe perhaps parameter names are like variable
+// names and can't start with a number.
 
+/*
 function square(3) {
     return num * num;
 }
+*/
 
 // =============> write the error message here
+// Answer: SyntaxError: Unexpected number
 
 // =============> explain this error message here
+// Answer: Yes we got an error message about the number 3. We wouldn't get a message about num not being defined
+// since the function isn't called in the code, so the inside of the function can't produce an error.
+// I will first try to update the 3 to n3, to see if it is a valid parameter name and see if the error goes away,
+// just as an experiment.
+
+// Answer: The error did go away. However it didn't solve our problem as we still want to receive 3 squared when
+// calling the function. I will change n3 to the proper parameter name, num. So it can be referenced inside the
+// function body. Then I will make a function call and pass in 3 there, as an argument to the parameter num.
+// Then I will log the result to see if it worked.
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
+function square(num) {
+  return num * num;
+}
 
+console.log(square(3));