Program to find Deteminant of 2x2 Matrix in C

Below is a program to find the determinant of a 2x2 matrix.

Please note that, when we say a 2x2 matrix, we mean an array of 2x2.

#include<stdio.h> int main() { printf("\n\n\t\tStudytonight - Best place to learn\n\n\n"); int a[2][2], i, j; long determinant; printf("\n\nEnter the 4 elements of the array\n"); for(i = 0; i < 2; i++) for(j = 0; j < 2; j++) scanf("%d", &a[i][j]); printf("\n\nThe entered matrix is: \n\n"); for(i = 0; i < 2; i++) { for(j = 0; j < 2; j++) { printf("%d\t", a[i][j]); // to print the complete row } printf("\n"); // to move to the next row } // finding the determinant of a 2x2 matrix determinant = a[0][0]*a[1][1] - a[1][0]*a[0][1]; printf("\n\nDterminant of 2x2 matrix is : %d - %d = %d", a[0][0]*a[1][1], a[1][0]*a[0][1], determinant); printf("\n\n\t\t\tCoding is Fun !\n\n\n"); return 0; }

Output: