I understand the concept of coding, that it’s a bunch of if/then/unless kind of hardwired decisions. But where, PHYSICALLY, and how does this happen? This one I need actually explained like I’m five. I’ve never understood how code physically implements itself into fruition.
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A processor has a “program counter”. This is basically a number that says which instruction is next. The CPU reads and executes the instruction at that location then increases the program counter.
A jump simply changes the program counter to a completely different number.
We also have conditional jumps. We can jump if the result of the previous instruction was zero, or negative.
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