Python 之 while 循环嵌套 输出九九乘法表

# 制作九九乘法表
i = 1
while i <= 9:
    # 定义一个列计数器
    col = 1
    # 开始循环
    while col <= i:
        # print("%d" % i, end="")
        print("%d * %d = %d" % (col, i, col*i), end="\t")
        col += 1

    # 这行代码的目的，就是在一行星星输出完成以后，添加换行！
    print("")
    i += 1
# 打印输出效果
"""
1 * 1 = 1  
1 * 2 = 2  2 * 2 = 4  
1 * 3 = 3  2 * 3 = 6  3 * 3 = 9  
1 * 4 = 4  2 * 4 = 8  3 * 4 = 12 4 * 4 = 16 
1 * 5 = 5  2 * 5 = 10 3 * 5 = 15 4 * 5 = 20 5 * 5 = 25 
1 * 6 = 6  2 * 6 = 12 3 * 6 = 18 4 * 6 = 24 5 * 6 = 30 6 * 6 = 36 
1 * 7 = 7  2 * 7 = 14 3 * 7 = 21 4 * 7 = 28 5 * 7 = 35 6 * 7 = 42 7 * 7 = 49 
1 * 8 = 8  2 * 8 = 16 3 * 8 = 24 4 * 8 = 32 5 * 8 = 40 6 * 8 = 48 7 * 8 = 56 8 * 8 = 64 
1 * 9 = 9  2 * 9 = 18 3 * 9 = 27 4 * 9 = 36 5 * 9 = 45 6 * 9 = 54 7 * 9 = 63 8 * 9 = 72 9 * 9 = 81 
"""

# 拓展知识 - 字符串中的转义字符
"""
    \t 在控制台输出一个制表符，协助在输出文本时 垂直方向 保持对齐
    \n 换行符
    \\ 反斜杠符号
    \' 单引号
    \" 双引号
    \r 回车
"""