#九九乘法表
# 1*1=1
# 1*2=2 2*2=4
# 1*3=3 2*3=6 3*3=9
# ...#循环嵌套
#行数
i = 1
while i <= 9:# 打印每行的内容j = 1while j <= i:print("%d * %d = %3d " % (i, j, i * j), end='')j += 1print() # 换行i += 1while嵌套：w = 1
while w < 10: #外层循环 n = 1# 内层循环while n <= w: # 外层循环一次，内层循环多次，（且次数不超过外层循环的次数）print("%d * %d = %d" %(n,w,w*n),end="\t")n+=1w+=1print()
while for 循环：w = 1
while w < 10:for n in range(1,w+1): # range(1,w+1) range函数包含头，不包含尾print("%d * %d = %d" % (n, w, w * n), end="\t")w+=1print()
for 嵌套：for w in range(1,10):for n in range(1,w+1):print("%d * %d = %d" % (n, w, w * n), end="\t")n+=1w+=1print()
D:\PYTHON3.6\python.exe H:/QIANfeng/第一章python语言基础/4_循环和列表/5_循环嵌套.py
1 * 1 = 1
2 * 1 = 2 2 * 2 = 4
3 * 1 = 3 3 * 2 = 6 3 * 3 = 9
4 * 1 = 4 4 * 2 = 8 4 * 3 = 12 4 * 4 = 16
5 * 1 = 5 5 * 2 = 10 5 * 3 = 15 5 * 4 = 20 5 * 5 = 25
6 * 1 = 6 6 * 2 = 12 6 * 3 = 18 6 * 4 = 24 6 * 5 = 30 6 * 6 = 36
7 * 1 = 7 7 * 2 = 14 7 * 3 = 21 7 * 4 = 28 7 * 5 = 35 7 * 6 = 42 7 * 7 = 49
8 * 1 = 8 8 * 2 = 16 8 * 3 = 24 8 * 4 = 32 8 * 5 = 40 8 * 6 = 48 8 * 7 = 56 8 * 8 = 64
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
