python第二次作业

1.求所有三位水仙花数（水仙花数就是:个位的立方➕十位的立方➕百位的立方＝这个数本身）

num = 100
while num < 1000:
    gewei = num % 10
    shiwei = num // 10 % 10
    baiwei = num // 100
    if gewei ** 3 + shiwei ** 3 + baiwei ** 3 == num:
        print(f"{num}是水仙花数")
    num += 1

for num in range(100, 1000):
    gewei = num % 10
    shiwei = num // 10 % 10
    baiwei = num // 100
    if gewei**3 + shiwei**3 + baiwei**3 == num:
        print(f"{num}是水仙花数")

2.用循环求10！

a = 1
b = 10
for i in range(1, b+1):
    a = a * i
print(a)

3.用循环求10！+9！+8！……1！

a = 1
b = 10
sum = 0
for i in range(1, b+1):
    a = i * a
    sum += a
print(sum)