Question

How to calculate the determinant of a 3X3 matrix in Rust

Answer 1

fn main() {
    let arr : Vec<Vec<i32>> = vec![vec![6, 1, 1], vec![4, -2, 5], vec![2, 8, 7]];
    
    let determinant = 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[1][2] * arr[2][0]) + 
                      arr[0][2] * (arr[1][0] * arr[2][1] - arr[1][1] * arr[2][0]);
    
    println!("{}", determinant);
}




/*
run:
    
-306 
      
*/

 

 

70+ SQL courses for beginners and professionals