Fix variable redeclaration in capitalise function

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

@@ -9,5 +9,17 @@ function capitalise(str) {
   return str;
 }
 
+//because str is already existing parameter we can not declare let str again. 
+// we can  rename  the str to fix the problem. 
+
+
+function capitalise(str) {
+  let cap_str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return cap_str;
+}
+
+console.log(capitalise("khilola"));
+
+
 // =============> write your explanation here
 // =============> write your new code here