I don’t understand what the starting point is. Do they just open a word document and start creating lines of code or is there some type of program that’s specifically used?
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Programming has a long history, starting with automated looms during the industrial revolution. The first “programs” were written by directly setting commands on the processor; a sequence of ones and zeros that move the internal switches to the right state to do what you want (add, subtract, copy, compare etc). Only much later did people moved to more high level languages like C, Ada, Fortran etc. Their compilers in term were written in assembly (which is a more human readable form of the individual instruction patterns). The first assemblers were “written” by manually inputting instructions through punch cards or manually wired memory.
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