X = [[10,17,6],
[14 ,7,6],
[27 ,18,9]]
Y = [[2,5,4],
[2,4,13],
[4,15,9]]
result = [[0,0,0],
[0,0,0],
[0,0,0]]
迭代输出行
for i in range(len(X)):
迭代输出列
for j in range(len(X[0])):
result[i][j] = X[i][j] + Y[i][j]
for r in result:
print(r)
代码中len(x[0])什么意思,如何理解,求解,谢谢大家