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

i = 1
while i <= 9:
    j = 1
    while(j <= i):    # j的大小是由i来控制的
        print(f'{i}*{j}={i*j}', end='\t')
        j += 1
    print('')
    i += 1

i = 1
while i <= 9:
    for j in range(1, i+1):  # range()函数左闭右开
        print(f'{i}*{j}={i*j}', end=' ')
    i += 1
    print()

for i in range(1, 10):
    j = 0
    while j < i:
        j += 1
        print(f"{i}*{j}={i*j}", end=' ')
    print()

a = [1, 2, 3, 4, 5, 6, 7, 8, 9]
for i in a:
    j = 1
    while j <= i:
        print(f'{i}*{j}={i*j}', end='\t')
        # %-3d 是控制输出结果占据3位，且从左面开始对齐
        j += 1
    print()

def multiplication(n):
	if n < 10:
		for m in range(1, n+1):
			print(f"{m}*{n}={m*n}", end="\t")
		print()
		multiplication(n+1)
 
 
multiplication(1)

print('\n'.join([' '.join(["%2s x%2s = %2s" % (j, i, i*j) for j in range(1, i+1)]) for i in range(1, 10)]))

print('\n'.join([' '.join([f"{j}x{i}={i*j}" for j in range(1, i + 1)]) for i in range(1, 10)]))