s=input("请输入待处理字符串:")
st=" "
for i in range(len(s)):
ch=s[i]
if "0" <=ch<="9":
st=ch+st
else:
if "A"<=ch<="Z":
ch=ch. Lower( ) #函数lower( )的作用是将大写字母转换成小写。
st=st+ch
print(st)
执行程序后,输入字符串"Lucky2023!",输出的结果( )
A.3202lucky! | B.lucky2023! | C.!3202ykcul | D.!ykcul2023 |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2