Predicted what I expect, explained Syntax Error, added the new code

Author: debug2604

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

@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> I expect the function capitalise will turn first letter of string given by user into capital letter.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,5 +9,9 @@ function capitalise(str) {
   return str;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+// =============> The result was a Syntax error because str has been declared as parameter of function captialise before let reassign str.
+// =============>
+function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}