I’m not asking what computer code is. I’m asking how typing in commands physically opens/closes the little switches in computers?
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computers are made of layers of complexity. At the base level, you have the hardware. This is the physical thing. Electricity flows through it. Depending on how it flows, switches (transistors) open or close. Very early computers were just this level. They had mechanical switches that would send electricity down one path or another and then they would see the result.
The next level above this is the bios. This is a program built in to the microchips that take over the role of those mechanical switches from above.
Next is the OS. This is more complicated, with lots of tools, but it can translate everything into the simple language that the bios speaks.
Finally, there are applications. They manipulate data, they talk to the os, which talks to the bios, which talks to the hardware.
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