The variable for the Loop lesson

Question

Did my teacher want to make this intentionally confusing?
This code bugged me a lot:

letters = [ 'a', 'b', 'c' ]
for l in letters:
print(l)

He (or she) could have written

letters = [ 'a', 'b', 'c' ]
for MyVar in letters:
print(MyVar)

Answer 1

"MyVar" (capitalized) looks like a constant and doesn't give any information about what the variable contains, so I don't see why that would be a better name than "l". "letter" seems to be an adequate name.

Answer 2

consider it as:
for element in element:
where element is assumption variable, so you are free to give it any name you want, like;
for x in letters, or y...

Answer 3

In general, to loop through all elements, we need a indexing variable. I feel 'I' stand for indexing. U can find 'I' as example in many 'for' loop examples...