How do I create a magic square matrix using python

Question

A basket is given to you in the shape of a matrix. If the size of the matrix is N x N then the range of number of eggs you can put in each slot of the basket is 1 to N2 . You task is to arrange the eggs in the basket such that the sum of each row, column and the diagonal of the matrix remain same

This code is working only for odd numbers but not even numbers.

here’s my code that i tried but it didn’t work
`

def matrix(n): 
    m = [[0 for x in range(n)] 
                      for y in range(n)]
    i = n / 2
    j = n - 1
    num = 1
    while num <= (n * n): 
        if i == -1 and j == n:
            j = n - 2
            i = 0
        else:
            if j == n: 
                j = 0 
            if i < 0: 
                i = n - 1
        if m[int(i)][int(j)]:
            j = j - 2
            i = i + 1
            continue
        else: 
            m[int(i)][int(j)] = num 
            num = num + 1
        j = j + 1
        i = i - 1
    print ("Sum of eggs in each row or column and diagonal ",n * (n * n + 1) / 2, "n") 
    for i in range(0, n): 
        for j in range(0, n): 
            print('%2d ' % (m[i][j]),end = '') 
            if j == n - 1:  
                print()
n=int(input("Number of rows of matrix:"))
matrix(n)

`

Asked By: chirag2430

||

Source

Answer 1

def matrix(n): 
m = [[0 for x in range(n)] 
                  for y in range(n)]
i = n / 2
j = n - 1
num = 1
while num <= (n * n): 
    if i == -1 and j == n:
        j = n - 2
        i = 0
    else:
        if j == n: 
            j = 0 
        if i < 0: 
            i = n - 1
    if m[int(i)][int(j)]:
        j = j - 2
        i = i + 1
        continue
    else: 
        m[int(i)][int(j)] = num 
        num = num + 1
    j = j + 1
    i = i - 1
print ("Sum of eggs in each row or column and diagonal ",n * (n * n + 1) / 2, "n") 
for i in range(0, n): 
    for j in range(0, n): 
        print('%2d ' % (m[i][j]),end = '') 
        if j == n - 1:  
            print()

n=int(input("Number of rows of matrix:"))
matrix(n)

Answered By: Yuvraaj Bhatter

Answer 2

def forEvenNumber(n):
    arr = [[(n * y) + x + 1 for x in range(n)] for y in range(n)]
    for i in range(0, n // 4):
        for j in range(0, n // 4):
            arr[i][j] = (n * n + 1) - arr[i][j];
    for i in range(0, n // 4):
        for j in range(3 * (n // 4), n):
            arr[i][j] = (n * n + 1) - arr[i][j];
    for i in range(3 * (n // 4), n):
        for j in range(0, n // 4):
            arr[i][j] = (n * n + 1) - arr[i][j];
    for i in range(3 * (n // 4), n):
        for j in range(3 * (n // 4), n):
            arr[i][j] = (n * n + 1) - arr[i][j];
    for i in range(n // 4, 3 * (n // 4)):
        for j in range(n // 4, 3 * (n // 4)):
            arr[i][j] = (n * n + 1) - arr[i][j];
    print("nSum of all row, column and diagonals = ",
          n * (n * n + 1) // 2, "n")
    for i in range(n):
        for j in range(n):
            print('%2d ' % (arr[i][j]), end=" ")
        print()
def forOddNumber(n):
    mgsqr = [[0 for x in range(n)]
             for y in range(n)]
    r = n // 2
    c = n - 1
    num = 1
    while num <= (n * n):
        if r == -1 and c == n:
            c = n - 2
            r = 0
        else:
            if c == n:
                c = 0
            if r < 0:
                r = n - 1
        if mgsqr[int(r)][int(c)]:
            c = c - 2
            r = r + 1
            continue
        else:
            mgsqr[int(r)][int(c)] = num
            num = num + 1
        c = c + 1
        r = r - 1
    print("nSum of all row, column and diagonals = ",
          n * (n * n + 1) // 2, "n")
    for i in range(0, n):
        for j in range(0, n):
            print('%2d ' % (mgsqr[i][j]), end='')
        print()
print("nWELCOME:)n")
n = int(input("Please Enter Number of Rows and Column (n*n): "))
if n%2==0:
    forEvenNumber(n)
else:
    forOddNumber(n)
print("nThank You :)")

This should take in the even inputs and give the right outputs!

Answered By: Benz_10

How do I create a magic square matrix using python

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