input: Write a function to compute the sum of two variables and store the result in a third variable. If the sum is calculated successfully, print the result.
  assert sum_and_store(5, 8) == 13
  assert sum_and_store(0, 0) == 0
  assert sum_and_store(-5, 5) == 0
  assert sum_and_store(10, -3) == 7
  assert sum_and_store(-1, -1) == -2
output: def sum_and_store(a, b):
      result = a + b
      return result