pyhton自学第五天之作业内容

1. name = "aleX leNb "

请输出name变量对应的值中的"e" 所在索引位置

name = "aleX  leNb"
index = 0   #手动记录索引
for c in name:
    if c == 'e':   #如果字母是e
        print(index)   #打印索引
    index = index + 1

2.有字符串s = "123a4b5c"

        1)通过对s切片形成新的字符串s1, s1 = "123"

s = "123a4b5c"
print(s[:3])

        2)通过对s切片形成新的字符串s2,s2 = "a4b"

s = "123a4b5c"
print(s[3:6])

        3)通过对s切片形成新的字符串s3,s3 = "1345"

s = "123a4b5c"
print(s[::2])

    4)通过对s切片形成新的字符串s4,s4 = "2ab"

s = "123a4b5c"
print(s[1:6:2])

        5)通过对s切片形成新的字符串s5,s5 = "c"

s = "123a4b5c"