九九乘法口决

for循环

方法1：

for i in range(1,10):
    line = ''
    for j in range(1,10):
        if j <= i:
        # line += "{} * {} = {}\t".format(j, i, j*i)
            line = line + "{} * {} = {}\t".format(j, i, j*i)
        # else:
        #     print('====')
        #     continue
        #     print('++++')
    print(line)

方法2：

for i in range(1,10):
    for j in range(1, i+1):
        print("{} * {} = {}".format(j, i, j*i),end='\t')
    print()

 

while循环

num = 1
while num <= 9:
    start = 1
    while start <= num:
        print("{} * {} = {}".format(start, num, start*num),end='\t')
        start += 1
    print()
    num += 1