app.js

@@ -1,6 +1,5 @@
-function display(char1, char2, char3, char4, ...others) {
-    console.log(others);
-    console.log(char1, char2, char3, char4);
+function sayHi(message, name = 'World') {
+    console.log(message + " " + name);
 }
-let letters = 'abcdefgh';
-display(...letters);
+sayHi("Hello");
+sayHi("Hi", 'John');