The while loop in python prints the four shapes of stars

Continuously output five lines of * on the console, and the number of each asterisk increases once [Recommended reading: Python video tutorial]
*
**
***
****
*****

#1.定义一个行计数器row = 1while row <= 5:    #定义一个列计数器
    col = 1
    #开始循环
    while col <= row:
        print(&#39;*&#39;,end=&#39;&#39;)
        col += 1
    print(&#39;&#39;)
    row += 1

#1.定义一个行计数器row = 1while row <= 5:    #定义一个列计数器
    col = 5
    #开始循环
    while col >= row:
        print(&#39;*&#39;,end=&#39;&#39;)
        col -= 1
    print(&#39;&#39;)
    row += 1

##So what if you want spaces first, then *

row = 1while row <= 5:  # 行数，循环五次
    a = 1
    col = 1
    while a <= 5 - row:  # a控制每行的空格数=5-行数，例如：第一行为5-1=4个空格
        print(&#39; &#39;, end=&#39;&#39;)  # 不换行
        a += 1
    while col <= row:  # col控制*的数量=行数
        print(&#39;*&#39;, end=&#39;&#39;)
        col += 1
    print()
    row += 1

Another arrangement

row = 1while row <= 5:  # 行数，循环五次
    a = 1
    col = 1
    while a <= row - 1:  # a控制每行的空格数=5-行数，例如：第一行为5-1=4个空格
        print(&#39; &#39;, end=&#39;&#39;)  # 不换行
        a += 1
    while  col <= 6-row:  # col控制*的数量=行数
        print(&#39;*&#39;, end=&#39;&#39;)
        col += 1
    print()
    row += 1

The above is the detailed content of The while loop in python prints the four shapes of stars. For more information, please follow other related articles on the PHP Chinese website!