How it works
An in is how we tell the computer something: a keyboard, a mouse or a microphone.
An out is how the computer tells us: a screen or a speaker.
Things go in, the computer follows its steps, and things come out.
Worked examples
The microphone
- Nia talks into the microphone.
- Her voice goes in, so the microphone is an in.
The speaker
- Nia whispers to the speaker, and nothing happens.
- The speaker plays sound out. It does not listen.
- To talk to the computer, use the microphone.
The talking card
- Nia types and clicks, so letters and clicks go in.
- The screen shows the card, and the speaker plays a song.
- Those come out.