# 通过索引获取字符串中的某个字符
s1 = 'hello world'
print(s1[0])
print(s1[-1])
h
d
# 分片
print(s1[6:11])
print(s1[:6])
print(s1[::2])
print(s1[::-1])
world
hello
hlowrd
dlrow olleh
# 乘法
print(s1 * 2)
hello worldhello world
print('b' in s1)
print('b' not in s1)
False
True
print(len(s1))
print(min(s1))
print(max(s1))
11
w
a = [1, 2, 3, 6, 7]
print(2 in a)
print(2 not in a)
True
False
print(max(a))
print(min(a))
7
1
print(2 * a)
[1, 2, 3, 6, 7, 1, 2, 3, 6, 7]
a[0] = 20
# s1[0] = 'a'
