Diagonal Difference in Go

DiagonalDifferenceInGo.go

package main

import "fmt"
import "math"

func main() {
    var n int
    
    fmt.Scan(&n)
    
    var d1, d2, e int
    
    for i := 0; i < n; i++ {
        for j := 0; j < n; j++ {
            fmt.Scan(&e)
            
            if i == j {
                d1 += e
            }
            
            if j == n - i  - 1 {
                d2 += e
            }            
        }
    }
    
    fmt.Print(math.Abs(float64(d1 - d2)))
}

Given a square matrix of size , calculate the absolute difference between the sums of its diagonals.

Input Format

The first line contains a single integer, . The next lines denote the matrix's rows, with each line containing space-separated integers describing the columns.

Output Format

Print the absolute difference between the two sums of the matrix's diagonals as a single integer.

Sample Input

3
11 2 4
4 5 6
10 8 -12
Sample Output

15
Explanation

The primary diagonal is:
11
5
-12

Sum across the primary diagonal: 11 + 5 - 12 = 4

The secondary diagonal is:
4
5
10
Sum across the secondary diagonal: 4 + 5 + 10 = 19
Difference: |4 - 19| = 15