calculate the absolute difference between the sums of its diagonals.
Given a square matrix, calculate the absolute difference between the sums of its diagonals. For example, the square matrix is shown below: function diagonalDifference ( arr ) { let arrayOne = 0 let arrayTwo = 0 for ( let i = 0 ; i < arr . length ; i ++ ){ const k = ( arr . length - 1 - i ) const array1 = arr [ i ][ i ] const array2 = arr [ i ][ k ] arrayOne += array1 arrayTwo += array2 } if ( arrayOne - arrayTwo < 0 ){ return Number (( arrayOne - arrayTwo ) * - 1 ) } else { return (( arrayOne - arrayTwo ) ) } }