I was working on a Question which was ,
Input - A list of numbers - [1,2,3,4,5] #example
We have to produce the subsets of this list and display those subsets whose sum is equal to 10
Output Format - [ [1,2] , [2,3] , [4,5,6] ] #example
Means we have to append those subset in a list whose sum is 10 and make a nested list and print it as an output.
here is my code …
defmodule Combination do def combine() do  end def combine([head | tail]) do tail_combinations = combine(tail) merged_combinations = Enum.map( [] ++ tail_combinations, fn c -> c ++ [head] end ) tail_combinations ++ merged_combinations end #Main thing I am doing here, i am Checking the sum of the subsets but unable to append the list of subset into another list and print the final list def display(lis) do a= for vale <- Combination.combine(lis) do if Enum.sum(vale)==6 do a=a++[vale] end end IO.inspect(a) end end Combination.display([1,2,3,4])
erts@eyrc:~/fr_task0_9999/.vscode$ elixir practice.exs warning: variable "a" is unused (if the variable is not meant to be used, prefix it with an underscore) practice.exs:17: Combination.display/1  erts@eyrc:~/fr_task0_9999/.vscode$
Can anyone help me i am new to elixir and i got stuct at this point.
Tell me how can i append the list in another list and print the whole list at once .