python -08-打印图形*

"""
使用while嵌套循环输出如下图形：

*
* *
* * *
* * * *
* * * * *
"""

num = 1
while num <= 5:
    j = 1
    while j <= num:
        print("*",end="")
        j += 1
    print()    # 换行
    num += 1