• ulterno@programming.dev
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    4 hours ago

    A good way to feel that for yourself is by programming a little program in Assembly and C.

    Make sure the program needs to loop a bit and perhaps also require some if/ else logic.
    A simple one would be to read a 1000 integers and return the sum.

    In C, you would do something like:

    int MAX = 1000;
    int accumulator = 0;
    int counter = 0;
    while (counter < MAX)
    {
        accumulator = accumulator + value_at_next_memory_location_by_counter;
        counter = counter + 1;
    }
    

    In assembly, you would go (writing pseudo, because I have forgotten most assembly stuff):

    set reg1 = 1000 // For max value
    set accumulator = 0 // just choose a register and consider it an accumulator. older CPUs have a fixed accumulator and you can only operate on that. I am not considering that here
    set reg2 = 0 // For counter
    tag LOOP:
    set flag if true reg2 < reg1
    jump if false -> END
    move from memory location @counter(reg2) to reg3
    add accumulator reg3
    add reg2 1
    goto -> LOOP
    tag END:
    

    I also realised that you could just try using C with goto instead of any loops and would realise similar things, but I’m not in the mood to rewrite my comment.


    In conclusion, it is easier to understand something like BASIC, if you haven’t been introduced to other languages, but these {} structures end up making it easier to catch control flows at a glance.
    That’s also the argument I use when telling people to have opening and closing brackets of the same level at the same indent, while people prefer stuff like:

    if {
    ...
    } else {
    ...
    }