C program to compute determinant of a 3X3 matrix

#include<stdio.h>
#include<string.h>
int main()
{
    int arr[3][3];
    int det,j,i;

    printf("enter elements of the array\n");
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
            {
                printf("arr[%d][%d]",i,j);
                scanf("%d", &arr[i][j]);
            }
    }


    det = arr[0][0]*(arr[1][1]*arr[2][2]-arr[1][2]*arr[2][1])-arr[0][1]*(arr[1][0]*arr[2][2]
        -arr[2][0]*arr[1][2])+arr[0][2]*(arr[1][0]*arr[2][1]-arr[2][0]*arr[1][1]);

    printf("The Determinant of the matrix is: %d", det);

}