# 循環
# Python的循環有兩種，一種是for...in循環，一種是while循環

# for...in循環
print(‘for...in循環‘)

print(‘#1 依次把list或tuple中的每個元素叠代出來‘)
names = [‘Micheal‘, ‘Bob‘, ‘Tracy‘]
for name in names:
    print(name)

print(‘#2 計算1-10的整數之和‘)
s = 0
for x in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]:
    s += x
print(s)

print(‘#3 計算1-100的整數之和‘)
s = 0
# range()生成序列是左閉右開區間,從0開始
# range(101)生成[0,1,2...100]
l = list(range(101))
for x in l:
    s += x
print(s)

print(‘------------------------------‘)

# while循環
print(‘while循環‘)
print(‘計算100以內所有奇數之和‘)
s = 0
n = 99
while n > 0:
    s += n
    n = n - 2
print(s)

Python中的循環