常见例子

1、求100以内的所有整数之和

s = 0
for i in range(101):
    s += i
print(s)

输出结果:

>>> 
5050
>>> 

2、9 X 9乘法口诀

for i in range(1,10):
    for j in range(1,i+1):
        if j <= i:
           print('%s x %s =%2s'%(j,i,i*j),end=' ')
    print()

输出结果:

1 x 1 = 1 
1 x 2 = 2 2 x 2 = 4 
1 x 3 = 3 2 x 3 = 6 3 x 3 = 9 
1 x 4 = 4 2 x 4 = 8 3 x 4 =12 4 x 4 =16 
1 x 5 = 5 2 x 5 =10 3 x 5 =15 4 x 5 =20 5 x 5 =25 
1 x 6 = 6 2 x 6 =12 3 x 6 =18 4 x 6 =24 5 x 6 =30 6 x 6 =36 
1 x 7 = 7 2 x 7 =14 3 x 7 =21 4 x 7 =28 5 x 7 =35 6 x 7 =42 7 x 7 =49 
1 x 8 = 8 2 x 8 =16 3 x 8 =24 4 x 8 =32 5 x 8 =40 6 x 8 =48 7 x 8 =56 8 x 8 =64 
1 x 9 = 9 2 x 9 =18 3 x 9 =27 4 x 9 =36 5 x 9 =45 6 x 9 =54 7 x 9 =63 8 x 9 =72 9 x 9 =81 

3、输出100以内能被7整除的整数

List =[]
for i in range(101):
    if i % 7 ==0:
        List.append(i)
print(List)

输出结果:

[0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
>>>