How Does a Computer (Physically) Read Code?

A computer reads code by turning letters and symbols into simple on-and-off signals that it can understand.

Imagine you have a super smart toy robot that only knows two words: "on" and "off." That’s all it needs to work, just like how your light switch turns the room on or off.

Inside a computer, everything is made up of tiny switches called transistors. These switches can be either on (which we call "1") or off (which we call "0"). When you write code, like print("Hello, world!"), the computer turns those letters and symbols into a long string of 1s and 0s.

The computer has a part called the processor, which is like its brain. The processor reads these strings of 1s and 0s one by one, just like you read a story from top to bottom. Each number tells it what to do, whether to add numbers, move letters around, or even say "Hello, world!" on the screen.

So when you press Enter, your code becomes a journey of tiny switches turning on and off, all working together to make something amazing happen!