#-*- coding:UTF-8 -*-

#for .... in 循环
names=[‘Michel‘,‘Bob‘,‘Tracy‘]
for  name  in  names:
    print   name
    
#for x  in ...  把每个元素代入变量 x
sum =0
for  x  in [1,2,3,4,5,6]:
    sum=sum+x
print  sum

#range()函数可以生成一个整数序列,range(5)生成0到4的整数序列

sum =0

for  x  in range(101):
    sum=sum+x
print  sum   


#while 循环,只要条件满足就不断循环，条件不满足时退出,计算100以内的所有奇数之和
sum=0
n=99
while  n>0:
    sum=sum+n
    n=n-2
print sum