// Define the function function greetUser(userName) return "Hey " + userName + ", welcome to 2020!";
// Use the function let message = greetUser("Jess"); console.log(message); // Output: Hey Jess, welcome to 2020! javascript beginner bootcamp (2020)
| Type | What it holds | Example | |------|---------------|---------| | String | Text | "I love pizza" | | Number | Numbers | 42 , 3.14 | | Boolean | True/False | true , false | | Undefined | Nothing yet | let ghost; | welcome to 2020!"
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