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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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I think it's a convention taken from math notation conventions.
I is short for "index" for a traditional for loop for mapping over an array and looking up by index. J comes after I and is used for nested loops so it doesn't shadow the outer I.
Is it for “index” or “iterator”?
yes