python中for、while语句计算1-100的和

python中for、while语句计算1-100的和。

1、for语句

1-100的和

>>> sum = 0
>>> for i in range(1,101): sum += i >>> print(sum) 5050
>>> 

 

1-100内偶数的和

>>> sum = 0
>>> for i in range(101): if i % 2 == 0: sum += i >>> print(sum) 2550

 

2、while语句

方法1：

>>> sum = 0
>>> i = 100
>>> while i > 0: sum += i i = i - 1

    
>>> print(sum) 5050

 

方法2：

>>> i = 1
>>> j = 100
>>> sum = 0
>>> while i <= j: sum += i i += 1

    
>>> print(sum) 5050