day-11字符串的魔法(三)

/user/bin/env python
# -*- coding:utf-8 -*-
# ---------------------------------------------
test = "alex"
# 索引，下标，获取字符串的某一个字符
v = test[3]
print(v)

# 切片
v = test[0:4]#>=0,<4
print(v)

# len
test = "孟慧婷妹子有种冲我来"
v = len(test)
print(v)

index = 0
while index < len(test):
    v = test[index]
    print(v)
    index += 1
print('over')

# for循环
test = "孟慧婷妹子有种冲我"
for mht in test:
    print(mht)
# 字符串一旦创建不可修改
# 一旦修改都会重新生成字符串

# break
test = "人生苦短"
for item in test:
    print(item)
    break

# count终止当前循环
lest = "kedccccdfx"
for it in test:
   continue
   print(it)

# range帮助创建连续的数字,通过设置步长指定不连续
# 在python2.7会输出0-99
# python3x中只有for循环才会输出0-99
v1 = range(0,100,5)
print(v1)

for item in v1:
    print(item)
# 将文件对应的索引打印出来
test = "孟慧婷妹子有种冲我"
for mht in test:
    print(mht)

# 获取用户输入，并将之通过索引形式打印出来呢
test = input('>>>')
for temp in test:
    print(temp)
l = len(test)
print(l)