JavaScript Basics Vocabulary

Word Bank

Fill In the Blanks

1) is a programming language that runs on many different devices.
2) lets us run JavaScript outside of a web browser, like in the terminal.
3) A is like a labeled box where you store information.
4) Use when a variable might change; use when it stays the same.
5) A is text wrapped in quotes, like “Hello”.
6) A is a numeric value without quotes, like 42.
7) A is either true or false.
8) displays information in the terminal so you can see what your program is doing.
9) is joining strings together using the + symbol.
10) An is a symbol that performs an action, like + or -.

Quick Checks

• Circle the valid variable names: myName / my-name / my name / firstName
• Draw a line matching data types to examples:
  • String             42
  • Number           "Hello"
  • Boolean           true

Stretch: Code Detective

Find and circle the mistake in this code:

let my name = "Sam;
const age = 12;
console.log("I am" + name + "years old");

Hint: Look for missing quotes, spaces in names, and missing spaces in output!