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Operations on Matrix using OOP concepts in Python | Addition | Subtraction | Multiplication | Transpose

     This is the same problem Statement as mentioned in Operations on Matrix using Python | Addition | Subtraction | Multiplication | Transpose but, in this solution, we used oop concepts like class and member function, etc.

 Problem:- Write a Python program to compute the following computation on the matrix:

    a) Addition of two matrices

    b) Subtraction of two matrices

    c) Multiplication of two matrices

    d) transpose of a matrix

Note: Scroll Horizontally to see the full line of code.

class Matrix:

    def __init__(self):
        self.matrix = None
        self.r = None
        self.c = None

    def addelem(self):
        self.r = int(input("Enter the no. of rows: "))
        self.c = int(input("Enter the no. of columns: "))
        self.matrix = []
        for i in range(self.r):
            row = []
            for j in range(self.c):
                print("Enter the (", i, ",", j, ") th element: ", end="")
                elem = int(input())
                row.append(elem)
            self.matrix.append(row)

    def printMatrix(self):
        self.r = len(self.matrix)
        for i in range(self.r):
            print("[ ", end="")
            for j in range(len(self.matrix[i])):
                print(self.matrix[i][j], end=" ")
            print("]")

    def addition(self, B):
        C = Matrix()
        if (self.r == B.r) and (self.c == B.c):
            C.matrix = []
            for i in range(self.r):
                row = []
                for j in range(self.c):
                    elem = self.matrix[i][j] + B.matrix[i][j]
                    row.append(elem)
                C.matrix.append(row)
            return C
        else:
            C.matrix = None
            print("\nAddition is not Possible.")

    def subtraction(self, B):
        C = Matrix()
        if (self.r == B.r) and (self.c == B.c):
            C.matrix = []
            for i in range(self.r):
                row = []
                for j in range(self.c):
                    elem = self.matrix[i][j] - B.matrix[i][j]
                    row.append(elem)
                C.matrix.append(row)
            return C
        else:
            C.matrix = None
            print("\nSubtraction is not Possible.")

    def transpose(self):
        C = Matrix()
        C.matrix = []
        for j in range(self.c):
            row = []
            for i in range(self.r):
                elem = self.matrix[i][j]
                row.append(elem)
            C.matrix.append(row)
        return C

    def multiplication(self, B):
        C = Matrix()
        if self.c == B.r:
            C.matrix = []
            for i in range(self.r):
                row = []
                for j in range(B.c):
                    elem = 0
                    for k in range(B.r):
                        elem += self.matrix[i][k] * B.matrix[k][j]
                    row.append(elem)
                C.matrix.append(row)
            return C
        else:
            C.matrix = None
            print("\nMultiplication is not possible!")


cont = 'y'
while cont == 'y':
    # Matrix A
    A = Matrix()
    print("Matrix A: ")
    A.addelem()
    print("Matrix A is: ")
    A.printMatrix()

    # Matrix B
    B = Matrix()
    print("Matrix B: ")
    B.addelem()
    print("Matrix B is: ")
    B.printMatrix()

    cont1 = 'y'
    while cont1 == 'y':
        print("<-----Menu----->")
        print("1.Addition\n2.Subtraction\n3.Multiplication\n4.Transpose")
        choice = int(input("Enter the Choice"))
        if (choice == 1):
            C = A.addition(B)
            if C is not None:
                print("\nMatrix A is: ")
                A.printMatrix()
                print("\nMatrix B is: ")
                B.printMatrix()
                print("\nAddition is: ")
                C.printMatrix()

        elif (choice == 2):
            C = A.subtraction(B)
            if C is not None:
                print("\nMatrix A is: ")
                A.printMatrix()
                print("\nMatrix B is: ")
                B.printMatrix()
                print("\nSubtraction is: ")
                C.printMatrix()
        elif (choice == 3):
            C = A.multiplication(B)
            if C is not None:
                print("\nMatrix A is: ")
                A.printMatrix()
                print("\nMatrix B is: ")
                B.printMatrix()
                print("\nMultiplication is: ")
                C.printMatrix()
        elif (choice == 4):
            C = A.transpose()
            print("\nMatrix A is: ")
            A.printMatrix()
            print("\nTranspose of Matrix A is: ")
            C.printMatrix()
            C = B.transpose()
            print("\nMatrix B is: ")
            B.printMatrix()
            print("\nTranspose of Matrix B is: ")
            C.printMatrix()
        else:
            print("Invalid Choice!!!\n")
        cont1 = input("Do you want to do any other operation? (y/n): ")

    cont = input("Do you want to continue? (y/n): ")

print("\nProgram Ended Successfully!!!")
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