javascript · level 1 · unit 1 · lesson 1
- meet it
- guess first
- your turn
- fix it
- nailed it
Tap a green word if you get lost.
meet it
is a list of instructions for a computer.
Code is instructions written down for a computer. A set of instructions that does one job, like a recipe for a cup of tea, is called a .
The computer follows a program exactly, starting at the top line and working down. It never guesses what you meant. It does what you wrote.
We will write our code in , the language every web browser understands. When you a program, the computer starts following it.
console.log("Hello!");Press run on this one-line program and the computer says Hello! back to you.
guess first
Spot the typo. What will the computer show?
Guess before you run it. Wrong guesses are how you learn, and nothing is marked.
console.log("Good mornign, everyone!");your turn
Your turn. Plan a morning routine.
Think of something you do after waking up and type it between the quotes on line 2. Then press run and watch the steps appear in order.
fix it
A dry bath? Can you fix it?
- The computer runs the lines from top to bottom. Which one happens first here?
- Getting in before the water? Brr. The two lines are in the wrong order.
- Swap the two lines so the water line is on top, then press run.
nailed it
you wrote and ran your first program. :D
- Code is a list of instructions for a computer.
- A program runs from the top line down.
- The computer does exactly what you write, not what you meant.
new words in your collection
- code
- program
- run
- JavaScript
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