Question

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

Answer 1

#include <stdio.h> 
 
#define SIZE 2
 
int main(void)
{   
    float arr[SIZE][SIZE] = { {3, 8}, {4, 6} };
    
    /*
     *       a b
     * arr = 
     *       c d
     * 
     * determinant = a*d - b*c
     * 
     */
     
    float determinant = (arr[0][0] * arr[1][1]) - (arr[0][1] * arr[1][0]);
 
    printf("%.2f", determinant);
           
    return 0;
}
 
   
/*
run:
     
-14.00
 
*/

 

70+ SQL courses for beginners and professionals