explaining error msg and fix the code

Author: abmhts

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

@@ -1,13 +1,19 @@
 // Predict and explain first...
 //  =============> write your prediction here
-
+  //- we expect a syntaxerror because "str" is already declared as function parameter and again as a variable within the same function scope.
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
+  //"Error: SyntaxError: Identifier 'str' has already been declared" why: because "str" declared twice.
 
-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
+  //- I changed the variable name to "strg" to avoid the error.
 // =============> write your new code here
+function capitalise(str) {
+  let strg = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return strg;
+}