Question

How to calculate the determinant of a 2X2 matrix in Python

Answer 1

w, h = 2, 2

arr = []
for y in range(h):
    arr.append([0 for x in range(w)])

arr[0][0] = 3
arr[0][1] = 8
arr[1][0] = 4
arr[1][1] = 6

'''
            a b
      arr =
            c d

      determinant = a*d - b*c

'''

determinant = (arr[0][0] * arr[1][1]) - (arr[0][1] * arr[1][0])

print(determinant)

'''
run:

-14

'''

 

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