2017-12-18python全栈9期第三天第四节之str的索引与切片

#!/user/bin/python
# -*- coding:utf-8 -*-
s = 'zdlswwzl'
s1 = s[0]
print(s1)
s2 = s[-1]
print(s2)
s3 = s[0:4]#顾头不顾尾
print(s3)
s4 = s[0:]
print(s4)
s5 = s[:]
print(s5)
s6= s[0:5:2]#加步长
print(s6)