# 九九乘法表:列*行= 结果
j = 1 # 控制行数
while j<10:
i = 1 # 控住列数
while i<= j:
print(i,"x",j,"=",i*j,end=" ")
# print(f"{i}*{j}={i*j}",end=' ')
i += 1
print()
j += 1
for i in range(1, 10):
for j in range(1, i+1):
print('{}x{}={} '.format(j, i, i*j), end='')
print()