python小程序18

#encoding:GBK

'''
题目：求s=a+aa+aaa+aaaa+aa...a的值，其中a是一个数字。例如2+22+222+2222+22222(此时
　　　共有5个数相加)，几个数相加由键盘控制。
1.程序分析：关键是计算出每一项的值。
2.程序源代码：
'''

a = int(input('please input a number which is between 1 and 9: '))
n = int(input('please input the numbers: '))
s = 0

if a < 1 or a > 10:
a = int(input('please input a number which is between 1 and 9: '))

lista = []
for i in range(n):
lista.append((i+1)*str(a))
print(lista)

for i in range(n):
s = s + int(lista[i])
print(s)