# 字符串
# " " '' 借助函数 。 .format() %。.........
s1 = "nihao" # 索引--index []
print(s1[0])
print(s1[1])
print(s1[2])
print(s1[3])
print(s1[4])
# n
# i
# h
# a
# o
# s1[index]-----索引 0,1,2,3.......
s1 = "nihao"
i = 0
while i <= 4:
print(s1[i])
i+=1
# n
# i
# h
# a
# o
# n
s1 = "nihao"
for i in s1:
print(i)
# n
# i
# h
# a
# o
# 切片 取内容
s2 = "nihao"
print(s2[1:])
# ihao
print(s2[:2])
# ni
print(s2[0:2])
# ni
print(s2 [1:2])
# i
print(s2[2:5])
# hao
# 步长 0,1,2......
s3 = "nihaome"
print(s3[1::3])
# io
print(s3[::3])
# nae
print(s3[::2])
# nhoe
print(s3[::])
# nihaome
print(s3[::-1]) # -1 倒叙取
# emoahin
print(s3[-2:-6:-1])
# moah
print(s3[2:-1])
# haom
print(s3[::-2])
# eohn
# 练习应用
s4 = "yukebanwozi"
for l in s4:
print(l)
l1 = "suiiabn"
o = 0
while o <=6:
print(l1[o])
o+=1
i1 = "suibian"
print(i1[:6])
# print()
i2 = "nihaomewk"
print(i2[2::5])
