input: Write a function to compute the sum of two given variables and store the result in a third variable. If the third variable is printed, it should display the sum of the two variables.
  assert compute_sum_and_store(5, 8) == 13
  assert compute_sum_and_store(10, 20) == 30
  assert compute_sum_and_store(0, 0) == 0
  assert compute_sum_and_store(-5, 5) == 0
  assert compute_sum_and_store(100, -100) == 0
output: def compute_sum_and_store(a, b):
      result = a + b
      return result