Python(28)_字符串的索引和切片

#-*-coding:utf-8-*-
'''
字符串索引与切片
'''
# 索引
s = 'bowen'
s1 =s[0]   # b
print(s1)
# 切片,包头不包尾
s2 = s[:3]
print(s2)  # bow

s3 = s[-1]
print(s3)  # n

s4 = s[-2]
print(s4) # e

s5 =s[:]
print(s5) # 复制

s6 = s[0:0]
print(s6)