Workshop › Typing Rain › Step 27 of 33

Words per minute

What we are doing

Typists measure themselves in words per minute (WPM). Words have different lengths, so every five letters count as one word. The time comes from the frames: at 60 frames a second, a minute is 3600 frames.

```js
let frames

  frames = 0

  if (state !== 'playing') return
  frames += 1

// Words per minute counts five letters as one word, the usual way.
const wpm = () => (frames === 0 ? 0 : Math.round(letters / 5 / (frames / 3600)))
```

What it means

• frames counts the frames played; it stops with the game because it is under the guard.
• letters / 5 is the words typed, frames / 3600 the minutes played; words divided by minutes is WPM.
• At frame 0 it would divide by zero, so it returns 0.

Your turn

1. Above let letters write let frames; in reset, above letters = 0, write frames = 0.
2. In update, under the guard line, write frames += 1.
3. Above const accuracy write the comment and wpm.

Skills: Game states, Functions

← Accuracy Your speed at the end →

All steps

1. A sky for the words
2. The ground
3. A word on the canvas
4. A function that draws
5. A list of words
6. Make them fall
7. The game loop
8. A new word from the list
9. Let it rain
10. Gone past the ground
11. Lock on to a word
12. Listen to the keyboard
13. Letter by letter
14. Half a word in yellow
15. Let go of a lost word
16. Lives
17. Hearts
18. Score
19. Out of lives
20. Freeze the game
21. The game over panel
22. Play again
23. Levels
24. Faster and faster
25. Best score
26. Accuracy
27. Words per minute
28. Your speed at the end
29. Where the keys go
30. Draw the keyboard
31. Light up the next key
32. Tap the keys
33. Build it yourself: change your mind