循环嵌套顾名思义循环里面套循环

# 循环嵌套顾名思义循环里面套循环

a = 1
b = 0
while a < 10:
    # print(1, a)
    b = 1
    while b <= a and b < 10:
        print("%d*%d=%d" % (b, a, a * b), end=" ")
        b += 1
    print()
    a += 1

format 格式化运算符 只需要填入数据即可

print("{}*{}={}".format(b, a, a * b), end=" ")