小白问题。python3 while循环嵌套中的问题 打印倒三角型

Question

1，打印一个三角形，
使用while，完成以下图形的输出

*
* *
* * *
* * * *
* * * * *
* * * *
* * *
* *
*

代码如下：

h=1
while h<=5:
    w=1
    while w<=h:
        print("x",end="")
        w+=1
    print("")
    h+=1
h=5
while h>=1:
    w=5
    while w>=h:
        print("x",end="")
        w-=1
    print("")    
    h-=1

x
xx
xxx
xxxx
xxxxx
x
xx
xxx
xxxx
xxxxx

可我打印的结果是这样，我实在想不明白怎么让第6行依次减少一个X
请高手解答！谢谢！

Answer 1

我也是萌新 加油共勉

h=5
while h>=1:

w=1
while h>w:
    print("x",end="")
    w+=1
print("")    
h-=1

Answer 2

def print_pic(num):
  print ''.join(['*'] * num)

i = 1
h = 5
while i <= (2 * h - 1):
  print_pic(i if i <= h else (2 * h - i))
  i = i + 1

i = 1
h = 5
while i <= (2 * h - 1):
  if i <= h:
    print ''.join(['*'] * i)
  else:
    print ''.join(['*'] * (2 * h - i))
  i = i + 1

# 递归
def print_pic(num, index=1):
  count = index if index <= num else 2 * num - index
  print ''.join(['*'] * count)
  if index > 2 * num - 1:
    return
  print_pic(num, index=index+1)

print_pic(5)

Answer 3

i = 1
while i <= 5:

j = 1
while j <= i:
    print("x",end=" ")
    j += 1
print("")
i += 1
if i==6:
    i = 5
    while i>=1:
        j = 1
        while i>j:
            print("x",end=" ")
            j += 1
        print("")
        i -= 1
    break