1.左上三角格式:
for i in range(1, 10): # 行
for j in range(1, 10-i+1,): # 列
print('{}x{}={}'.format(i, j, j*i), end='\t')
print('\n')


2.左下三角格式:
for i in range(1, 10):
for j in range(1, i+1):
# print("%d*%d=%2d" % (i, j, i*j), end="\t") # 两种格式,都可以输出
print('{}x{}={}'.format(i, j, i*j), end='\t')
print("\n")


3.右上三角格式:
for i in range(1, 10):
for k in range(1, i):
print(end=" ")
for j in range(i, 10):
print("%d*%d=%2d" % (i, j, i*j), end=' ')
print('\n')


4.右下角格式:
for i in range(1, 10):
for k in range(1, 10-i):
print(end=" ")
for j in range(1, i+1):
print("%d*%d=%2d" % (i, j, i*j), end=' ')
print('\n')

5.倒三角格式:
for i in range(1, 10):
for n in range(1, i):
print(end="\t")
for j in range(i, 10):
# print("%d*%d=%2d" % (i, j, i*j), end="\t") # 两种格式均可
print('{}x{}={}'.format(i, j, i*j), end='\t')
print('\n')


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