How do you define “if” for computers?

Question

I’m not a programmer, how do you get from binary 1s and 0s to “if x occurs complete y” How do you tell the computer to wait for a future input?

In: 2

Answer 1

CPUs have a BNE (branch not-equal) instruction, or similar. Code can set a register, and based on the state of that register (0 or 1) code either continues or jumps to another location.