Python Program for Addition of Two Matrices

Given two user input matrix. Our task is to display the addition of two matrix. In these problem we use nested List comprehensive.

Algorithm

Step1: input two matrix.
Step 2: nested for loops only to iterate through each row and columns.
Step 3: At each iterationshall add the corresponding elements from two matrices and shall store the result.

Example code

# Program to add two matrices using nested loop
A=[]
n=int(input("Enter N for N x N matrix : "))         #3 here
#use list for storing 2D array
#get the user input and store it in list (here IN : 1 to 9)
print("Enter the element ::>")
for i in range(n): 
   row=[]                                        #temporary list to store the row
for j in range(n): 
   row.append(int(input()))                #add the input to row list
A.append(row)                               #add the row to the list
print(A)
# [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
#Display the 2D array
print("Display Array In Matrix Form")
for i in range(n):
   for j in range(n):
      print(A[i][j], end=" ")                  #new line
   print() 
B=[]
n=int(input("Enter N for N x N matrix : "))        #3 here
#use list for storing 2D array
#get the user input and store it in list (here IN : 1 to 9)
print("Enter the element ::>")
for i in range(n): 
   row=[]                                        #temporary list to store the row
   for j in range(n): 
      row.append(int(input()))             #add the input to row list
   B.append(row)                            #add the row to the list
print(B)
# [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
#Display the 2D array
print("Display Array In Matrix Form")
for i in range(n):
   for j in range(n):
      print(B[i][j], end=" ")
   print()                                            #new line
result = [[0,0,0], [0,0,0], [0,0,0]] 
# iterate through rows 
for i in range(n):    
# iterate through columns 
for j in range(len(A[0])): 
   result[i][j] = A[i][j] + B[i][j] 
print("Resultant Matrix is ::>")
for r in result: 
   print("Resultant Matrix is ::>",r) 

Output

Enter N for N x N matrix : 3
Enter the element ::>
10
10
10
20
20
20
30
30
30
[[10, 10, 10], [20, 20, 20], [30, 30, 30]]
Display Array In Matrix Form
10 10 10 
20 20 20 
30 30 30 
Enter N for N x N matrix : 3
Enter the element ::>
100
100
100
200
200
200
300
300
300
[[100, 100, 100], [200, 200, 200], [300, 300, 300]]
Display Array In Matrix Form
100 100 100 
200 200 200 
300 300 300 
Resultant Matrix is ::> [110, 110, 110]
                                 [220, 220, 220]
                                 [330, 330, 330]