如何使用输入“n”在 python 中定义 n 阶矩阵？

Question

    num_array = list()
    num = input("Enter how many elements you want:")
    print('Enter numbers in array: ')
    for i in range(int(num)):
        n=input("num :")
        num_array.append(int(n))
    print('ARRAY: ',num_array)

this one was there but it's not gonna give me matrix of order n

Answer 1

I think if you want a matrix representation, you should go with a list of lists. You only input n numbers, but for a matrix you need n*n numbers. Do that with a second for loop like so:

# matrix is gonna be a list of lists 
num_array = list()

num = input("Enter how many elements you want:")
print('Enter numbers in array: ')

# first for iterates for rows
for i in range(int(num)):
    row = list()
    # second for iterates numbers in every row
    for j in range(int(num)):
        n = input("num :")
        row.append(int(n))
    num_array.append(row)

# output as matrix
for row in num_array:
    for number in row:
        print(number, end=" ")
    print()