Predict and explain errors. Fix by removing let so not to make new variable with same name

Author: MahirShah300

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

@@ -1,13 +1,22 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// the function has a parameter str, but then tries to make a new
+// variable also called str. so maybe cause error because str already exists
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
-}
+//function capitalise(str) {
+//  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+//  return str;
+//}
 
 // =============> write your explanation here
+// SyntaxError: Identifier 'str' has already been declared
+// Prediction was correct, str already exists
 // =============> write your new code here
+
+function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}