练习11(range)

# range 自定制的 数字范围的 可迭代对象 类比成列表

range(1,101)
print(range)
# range() 一般和for循环结合使用.
for i in range(1,11):
    print(i)

for i in range(1,20,2):
    print(i)

for i in range(1,101,2):
    print(i)

for i in range(10,0,-1):
    print(i)

l1 = ['alex','alex', 'wusir', 'taobao', 'egon','景女神', '文周老师', '日天']
# 方法一: 不好,如果有重复的,只会找到第一个的索引
for i in l1:
    print(l1.index(i))

# 方法二:
for i in range(0,len(l1)):
    print(l1[i])
    print(i)

s1 = 'alex'
l1 = ['alex','alex', 'wusir', 'taobao', 'egon','景女神', '文周老师', '日天']
print('a' in s1)
print('al' in s1)
print('alx' in s1)

print(['alex','alex'] in l1)
print('alex' in l1)

print('alex' not in l1)