RosettaCodeData/Task/Mutual-recursion/Jq/mutual-recursion-1.jq

def M:
  def F: if . == 0 then 1 else . - ((. - 1) | F | M) end;
  if . == 0 then 0 else . - ((. - 1) | M | F) end;

def F:
  if . == 0 then 1 else . - ((. - 1) | F | M) end;