循环

java的foreach循环

names = ['Michael', 'Bob', 'Tracy']
for name in names:
    print(name)
	
-----------------

Python提供一个range()函数，可以生成一个整数序列，再通过list()函数可以转换为list
range(n) 等价 range(0,n)

--------------
>>> list(range(5))
[0, 1, 2, 3, 4]

------------
sum = 0
for x in range(101):
    sum = sum + x
print(sum)

=====================================================

while循环
第二种循环是while循环，只要条件满足，就不断循环，条件不满足时退出循环

sum = 0
n = 99
while n > 0:
    sum = sum + n
    n = n - 2
print(sum)