3的倍数有3 6 9 12 15 18
21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 96 99
和是:(3+99)×33÷2=1683
for i in range(100): if i % 3 == 0: if i != 0: print(i)
3的倍数有3 6 9 12 15 18
21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 96 99
和是:(3+99)×33÷2=1683
for i in range(100): if i % 3 == 0: if i != 0: print(i)