Revert "Update 0.js"

This reverts commit 3bb9ddf.

Author: djebsoft

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

@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> the function is not going to work because a variable is declared twice (str)
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,5 +9,10 @@ function capitalise(str) {
   return str;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+// =============> the error message 'Identifier 'str' has already been declared', diplays because the toUpperCase function does not change the value of the varible declared 
+// but it creates a new one.
+// =============> my new code: 
+function capitalise(str) {
+  let result = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return resault;
+}