Question

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

Answer 1

// determinant is a scalar-valued of the entries of a square matrix

fun main() {
    val SIZE = 2
    
    val arr = arrayOf(
        floatArrayOf(3f, 8f),
        floatArrayOf(4f, 6f)
    )
    
    /*
     *       a b
     * arr = c d
     *
     * determinant = a*d - b*c
     */
    
    val determinant = (arr[0][0] * arr[1][1]) - (arr[0][1] * arr[1][0])
    
    println(determinant)
}



/*
run:
  
-14.0
  
*/

 

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