{"id":20190,"date":"2021-09-06T13:41:54","date_gmt":"2021-09-06T08:11:54","guid":{"rendered":"https:\/\/python-programs.com\/?p=20190"},"modified":"2021-11-22T18:36:26","modified_gmt":"2021-11-22T13:06:26","slug":"python-program-to-find-the-sum-of-all-elements-in-a-2d-array-matrix","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-program-to-find-the-sum-of-all-elements-in-a-2d-array-matrix\/","title":{"rendered":"Python Program to Find the Sum of all Elements in a 2D Array\/Matrix"},"content":{"rendered":"
In the previous article, we have discussed Python Program to Display an Upper Triangular Matrix<\/a><\/p>\n Given a matrix and the task is to find the sum of all elements in a 2-dimensional array of the given matrix in Python.<\/p>\n What is a matrix:<\/strong><\/p>\n A matrix is a rectangular sequence of numbers divided into columns and rows. A matrix element or entry is a number that appears in a matrix.<\/p>\n Example:<\/strong><\/p>\n <\/p>\n Above is the matrix which contains 5 rows and 4 columns and having elements from 1 to 20.<\/p>\n In this order, the dimensions of a matrix indicate the number of rows and columns.<\/p>\n Here as there are 5 rows and 4 columns it is called a 5*4 matrix.<\/p>\n Examples:<\/strong><\/p>\n Example1:<\/strong><\/p>\n Input:<\/strong><\/p>\n Output:<\/strong><\/p>\n Example2:<\/strong><\/p>\n Input:<\/strong><\/p>\n Output:<\/strong><\/p>\n Below are the ways to find the sum of all elements in a 2-dimensional array of the given matrix in Python:<\/p>\n Approach:<\/strong><\/p>\n Below is the implementation:<\/strong><\/p>\n Output:<\/strong><\/p>\n Approach:<\/strong><\/p>\n Below is the implementation:<\/strong><\/p>\n Output:<\/strong><\/p>\n If you are new to the Python Programming Language then practice using our Python Programming Examples for Beginners<\/a> as our expert team has designed them from scratch.<\/p>\n In the previous article, we have discussed Python Program to Display an Upper Triangular Matrix Given a matrix and the task is to find the sum of all elements in a 2-dimensional array of the given matrix in Python. What is a matrix: A matrix is a rectangular sequence of numbers divided into columns and …<\/p>\nGiven Matix : \r\n1 6 4 \r\n8 1 3 \r\n1 6 2<\/pre>\n
The sum of all elements in 2 dimensional array for a given matrix is :\r\n32<\/pre>\n
Given Matix : \r\n0 8\r\n3 7<\/pre>\n
The sum of all elements in 2 dimensional array for a given matrix is :\r\n18<\/pre>\n
Program to Find the Sum of all Elements in a 2D Array in Python<\/h2>\n
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Method #1: Using For Loop (Static Input)<\/h3>\n
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# Give the matrix as static input and store it in a variable.\r\nmtrx = [[1, 6, 4], [8, 1, 3], [1, 6, 2]]\r\n# Calculate the number of rows of the given matrix by\r\n# calculating the length of the nested list using the len() function\r\n# and store it in a variable mtrxrows.\r\nmtrxrows = len(mtrx)\r\n# Calculate the number of columns of the given matrix by\r\n# calculating the length of the first list in the nested list\r\n# using the len() function and store it in a variable mtrxcols.\r\nmtrxcols = len(mtrx[0])\r\nprint(\"The sum of all elements in 2 dimensional array for a given matrix is :\")\r\n# Take a variable say rslt_sum and initialize its value to 0.\r\nrslt_sum = 0\r\n# Loop till the given number of rows using the For loop.\r\nfor n in range(mtrxrows):\r\n # Inside the For loop, Iterate till the given number of columns using another\r\n # Nested For loop(Inner For loop).\r\n for m in range(mtrxcols):\r\n # Add the gvnmatrix[n][m] to the above-initialized\r\n # rslt_sum and store it in the same variable rslt_sum.\r\n rslt_sum += mtrx[n][m]\r\n# Print the variable rslt_sum to get the sum of all elements in a 2 dimensional array for\r\n# a given matrix\r\nprint(rslt_sum)\r\n<\/pre>\n
The sum of all elements in 2 dimensional array for a given matrix is :\r\n32<\/pre>\n
Method #2: Using For loop (User Input)<\/h3>\n
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# Give the number of rows of the matrix as user input using the int(input()) function\r\n# and store it in a variable.\r\nmtrxrows = int(input('Enter some random number of rows of the matrix = '))\r\n# Give the number of columns of the matrix as user input using the int(input()) function\r\n# and store it in another variable.\r\nmtrxcols = int(input('Enter some random number of columns of the matrix = '))\r\n# Take a list and initialize it with an empty value using [] or list() to say gvnmatrix.\r\nmtrx = []\r\n# Loop till the given number of rows using the For loop\r\nfor n in range(mtrxrows):\r\n # Inside the For loop, Give all the row elements of the given Matrix as a list using\r\n # the list(),map(),int(),split() functions and store it in a variable.\r\n l = list(map(int, input(\r\n 'Enter {'+str(mtrxcols)+'} elements of row {'+str(n+1)+'} separated by spaces = ').split()))\r\n # Add the above row elements list to gvnmatrix using the append() function.\r\n\r\n mtrx.append(l)\r\n \r\nprint(\"The sum of all elements in 2 dimensional array for a given matrix is :\")\r\n# Take a variable say rslt_sum and initialize its value to 0.\r\nrslt_sum = 0\r\n# Loop till the given number of rows using the For loop.\r\nfor n in range(mtrxrows):\r\n # Inside the For loop, Iterate till the given number of columns using another\r\n # Nested For loop(Inner For loop).\r\n for m in range(mtrxcols):\r\n # Add the gvnmatrix[n][m] to the above-initialized\r\n # rslt_sum and store it in the same variable rslt_sum.\r\n rslt_sum += mtrx[n][m]\r\n# Print the variable rslt_sum to get the sum of all elements in a 2 dimensional array for\r\n# a given matrix\r\nprint(rslt_sum)<\/pre>\n
Enter some random number of rows of the matrix = 2\r\nEnter some random number of columns of the matrix = 2\r\nEnter {2} elements of row {1} separated by spaces = 0 8\r\nEnter {2} elements of row {2} separated by spaces = 3 7\r\nThe sum of all elements in 2 dimensional array for a given matrix is :\r\n18<\/pre>\n
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