input: Write a function to check if an element exists within a given list of integers. The function should take two parameters: an element to search for and a list of integers. It should return True if the element exists in the list, and False otherwise. If the list is empty, it should return False.
  assert element_exists(5, [1, 3, 5, 7])==True
  assert element_exists(2, [1, 3, 5, 7])==False
  assert element_exists(3, [1, 3, 5, 7])==True
  assert element_exists(1, [1, 3, 5, 7])==True
  assert element_exists(10, [])==False
output: def element_exists(element, lst):
      return element in lst