updated 0.js template

Author: Fithi-Teklom

Sprint-2/1-key-errors/0.js

@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+// I think str is already declared even though it is a parameter.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,5 +9,8 @@ function capitalise(str) {
   return str;
 }
 
-// =============> write your explanation here
+// The error is a syntax error at line 8 in which as I have predicted. 'str' was already declared. 
 // =============> write your new code here
+function capitalize(str) {
+  let capitalized = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return capitalized;