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why not a,b or x,y?
(lemm.ee)
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this post was submitted on 09 Jul 2023
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It's my understanding that i,j are conventionally used in mathematics which carried over into programming, but specifically it comes from Fortran in which all integer variables start with "I" through "N" based on said mathematical convention
Yep, this is the answer. In Fortran, all variables are assumed to be floats, unless the variable starts with I, J, K, L, M or N. I’m sure they had a good reason, but it sounds so bizarre today!