input: Write a function to print the following pattern: for i in range(5): for j in range(i+1): print("*", end="") print("") for i in range(5, 0, -1): for j in range(i): print("*", end="") print("").
  assert print_pattern()==None
  assert print_pattern()==None
  assert print_pattern()==None
  assert print_pattern()==None
  assert print_pattern()==None
output: def print_pattern():
      for i in range(5):
          for j in range(i+1):
              print("*", end="")
          print("")
      for i in range(5, 0, -1):
          for j in range(i):
              print("*", end="")
          print("")