Fix variable redeclaration in capitalise function

Author: Monsur0001

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

@@ -10,4 +10,17 @@ function capitalise(str) {
 }
 
 // =============> write your explanation here
+//The error occurs because the variable "str" is being 
+//declared twice in the same scope. The parameter "str" 
+//is already defined as a function argument, and then it 
+//is being redeclared with "let str =". This causes 
+//a syntax error because we cannot declare a variable 
+//with the same name in the same scope. To fix this, we 
+//can either rename the parameter or the variable inside 
+//the function.
+
 // =============> write your new code here
+function capitalise(str) {
+  let capitalisedStr = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return capitalisedStr;
+}