Fix variable declaration error in capitalise function

Author: Darkidd77

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

@@ -1,5 +1,6 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// I predict there will be a syntax error but not sure what the error is yet. I think it has something to do with the variable declaration of str.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,5 +10,15 @@ function capitalise(str) {
   return str;
 }
 
+console.log(capitalise("hello world"));
 // =============> write your explanation here
+// it showed SyntaxError: Identifier 'str' has already been declared, this is because we have declared the variable str twice,
+//  once as a parameter and once as a variable inside the function. To fix this error, we can either change the name of the
+//  variable inside the function to something else like newStr.
 // =============> write your new code here
+function capitalise(str) {
+  let newStr = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return newStr;
+}
+
+console.log(capitalise("hello world"));