（1）while循环

1 #!/usr/bin/env python
2 #-*- coding:utf-8 -*-
3 n = 1
4 sum = 0
5 while n < 101:
6     print(n)
7     sum = sum + n
8     n = n + 1
9 print(sum)

（2）for循环

1 #!/usr/bin/env python
2 #-*- coding:utf-8 -*-
3 sum = 0
4 for a in range(1,101,1):
5     sum = sum + a
6 print(sum)

 

1 #!/usr/bin/env python
2 #-*- coding:utf-8 -*-
3 sum = 0
4 for a in range(1,101,1):
5     sum = sum + a
6     print(a)
7 print(sum)

执行结果：

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5050 Process finished with exit code 0