Question

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

Answer 1

package main

import "fmt"

func main() {
	arr := [][]float32{
		{6, 1, 1},
		{4, -2, 5},
		{2, 8, 7},
	}

	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])

	fmt.Println(determinant)
}


/*
       a b c
 arr = d e f
       g h i

 determinant = a*(e*i - f*h) - b*(d*i-f*g) + c*(d*h - e*g)

*/


/*

run:

-306.0

*/

 

70+ SQL courses for beginners and professionals