根据输入的行数来确定打印多少行,若为负数则重新输入,若为0则结束程序
案例 输入3
打印1
222
333333
为等腰三角形
本题最多是9行吗???
输入加强了判断功能,输出只要一行就能搞定:
Error = '输入错误,请重新输入!'
while True:
try:
n = int(input('请输入一个正整数n(0退出):'))
except:
print(Error)
continue
if 1<=n<=9:
break
elif n==0:
exit(0)
else:
print(Error)
for i in range(1,n+1):
print(f'{(str(i)*(i*2-1)):^{n*2-1}}')
height = int(input('请输入你想打印几行三角形:'))
if height ==0:
exit
if height <0:
height = int(input('重新输入:'))
else:
i = 1
while height:
print(' '*(height-1),str(i)*(1+(i-1)*2))
height -= 1
i += 1
while True:
n = int(input())
if n<0:continue
if n==0:break
for i in range(1,n+1):
print(' '*(n-i),end='')
for j in range(2*i-1):
print(i,end='')
print()