1 ''' 2 练习 while循环 3 其实就是练习手感，不停的敲 4 ''' 5 6 ''' 7 1. 打印星号(三⻆形) 8 * 9 ** 10 *** 11 **** 12 ***** 13 找规律，弄懂需求：5行5列，只显示了column <= row。显示的内容是* 14 解决：2个循环搞定 15 ''' 16 17 row = 1 18 while row <= 5: 19 20 column = 1 21 while column <= row: 22 print("*", end='') 23 column += 1 24 print() 25 row += 1 26 27 ''' 28 打印99乘法表 29 1 * 1 = 1 30 2 * 1 = 2 2 * 2 = 4 31 3 * 1 = 3 3 * 2 = 6 3 * 3 = 9 32 4 * 1 = 4 4 * 2 = 8 4 * 3 = 12 4 * 4 = 16 33 5 * 1 = 5 5 * 2 = 10 5 * 3 = 15 5 * 4 = 20 5 * 5 = 25 34 6 * 1 = 6 6 * 2 = 12 6 * 3 = 18 6 * 4 = 24 6 * 5 = 30 6 * 6 = 36 35 7 * 1 = 7 7 * 2 = 14 7 * 3 = 21 7 * 4 = 28 7 * 5 = 35 7 * 6 = 42 7 * 7 = 49 36 8 * 1 = 8 8 * 2 = 16 8 * 3 = 24 8 * 4 = 32 8 * 5 = 40 8 * 6 = 48 8 * 7 = 56 8 * 8 = 64 37 9 * 1 = 9 9 * 2 = 18 9 * 3 = 27 9 * 4 = 36 9 * 5 = 45 9 * 6 = 54 9 * 7 = 63 9 * 8 = 72 9 * 9 = 81 38 找规律 39 1. 首先9 X 9 的表格 40 2. 每行都是： 列c从1开始 && 小于等于行号r， 都有r表达式，表达式内容是1 * r、2 * r、…… r*r 41 42 ''' 43 row = 1 44 while row <= 9: 45 column = 1 46 while column <= row: 47 print(column * row, end='\t') 48 # print(f"{row} * {column} = {column * row}", end='\t') 49 column += 1 50 print() 51 row += 1