如何使用python 2.7制作三角形 [英] how to make triangle using python 2.7

问题描述

我想像这样在python 2.7中创建空心三角形图案

I want to create the hollow triangle pattern in python 2.7 like this

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

我想我可以使用循环代码

I think I can use loop code

line = 5
for i in range (line):
    print (line-i) * " " + (line+1) * "* "

但输出是

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

有人帮我做空心三角形吗?谢谢.

Anyone help me to make hollow triangle? Thank you.

推荐答案

line = 5
print (line-1) * " " + "* "
for i in xrange(1,line-1):
    print (line-i-1)* " " +  "*" + (2*i -1)*" " + "* "
print (line) * "* "

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