0.js committed

Author: carlosyabreu

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

@@ -1,13 +1,41 @@
 // Predict and explain first...
 //  =============> write your prediction here
 
+/** Prediction:
+ * The code will throw an error because the parameter str and the variable str inside the function are both declared in the same scope.
+ * 
+*/
+
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
+/** Original function:
+ *
 function capitalise(str) {
   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
+*/
 
 // =============> write your explanation here
+/** Explanation:
+ * The error occurs because:
+ *
+ * The function parameter str is already declared in the function scope
+ * Inside the function, we're trying to redeclare str using let which creates a new variable in the same scope
+ * JavaScript doesn't allow redeclaring a variable with let in the same scope
+ * The error message would be something like:
+ * SyntaxError: Identifier 'str' has already been declared
+*/
+	
 // =============> write your new code here
+
+function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}
+
+// Test the function
+console.log(capitalise("hello")); // "Hello"
+console.log(capitalise("world")); // "World"
+