j = 1
# 4为行数,可变
while j <= 4:
# 每一行开头所打印的空格
k = 0
while k < j - 1:
print(" ", end="")
k += 1
# 每一行所需打印的星号数
i = 7
while i >= 2 * j - 1:
print("?", end="")
i -= 1
print()
j += 1
打印如下:
???????
?????
???
?