Erlang Programming/Using lists

Using lists foreach 3> lists:foreach( fun(X)->X*X end, [1,2,3]). > produces no output because the purpose of foreach is to generate side-effects. However, 4> lists:foreach( fun(X)->io:format("~w ",[X]) end, [1,2,3,4]). 1 2 3 4 does work, because io:format() is a side effect function. sequence of numbers lists:seq(1,100) is like range(1,101) in python. 5> lists:seq(1,10). [1,2,3,4,5,6,7,8,9,10] sort lists:sort( A ) is what you think. 6> lists:sort([1,3,2,6,5,4]). [1,2,3,4,5,6] 7> lists:sort([a,d,b,c]). [a,b,c,d] 8> lists:sort([f,e,a,"d","c",{b}]). [a,e,f,{b},"c","d"]