* ** *** **** *****
line = int(input('请输入行数'))
for i in range(line+1):
for j in range(i):
# end = '' 不换行~
print('*',end='')
print()
* ** *** **** *****
line = int(input('请输入行数'))
for i in range(line+1):
for j in range(i):
# end = '' 不换行~
print('*',end='')
print()