Fix variable redeclaration in capitalise function and update predictions and explanations

Author: MohammedNaru

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

@@ -1,5 +1,8 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> write your prediction here 
+
+// I predict that the code will throw an error when trying to call the function capitalise with a string input
+// because the variable 'str' is being declared twice within the same scope, which is not allowed in JavaScript.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -10,4 +13,14 @@ function capitalise(str) {
 }
 
 // =============> write your explanation here
+
+// The code will throw a SyntaxError because the variable 'str' is being declared twice within the same scope.
 // =============> write your new code here
+
+function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}
+
+// Example:
+console.log(capitalise("hello")); // Output: "Hello"