python循环start=int(input(‘请输入初始值:’))end=int(input(‘请输入结束值:’))step=int(input(‘请输入步长:’))for i in range(start,end,step):print(s[i],end=’ ')i=0j=len(a)-1while i
a=123456b=0while a>0:b=b*10+a%10a//=10print(b)a=123456b=0while a>0:b=b*10+a%10a//=10print(b)a=123456b=0while a>0:b=b*10+a%10a//=10print(b)a=1234print(a)a=‘12’3’print(a)a...