1-2+3-4......99
sum = 0 count = 1 while count < 100: if count % 2 == 0 : sum = sum - count else: sum = sum + count count += 1 print(sum)
sum = 0 count = 1 while count < 100: if count % 2 == 0 : sum = sum - count else: sum = sum + count count += 1 print(sum)