static void printDiagonalSums ( int [ ] [ ] mat , int n ) {
  int principal = 0 , secondary = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < n ;
    j ++ ) {
      if ( i == j ) principal += mat [ i ] [ j ] ;
      if ( ( i + j ) == ( n - 1 ) ) secondary += mat [ i ] [ j ] ;
    }
  }
  System . out . println ( "Principal Diagonal:" + principal ) ;
  System . out . println ( "Secondary Diagonal:" + secondary ) ;
}

static void printDiagonalSums ( int [ ] [ ] mat , int n ) { int principal = 0 , secondary = 0 ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < n ; j ++ ) { if ( i == j ) principal += mat [ i ] [ j ] ; if ( ( i + j ) == ( n - 1 ) ) secondary += mat [ i ] [ j ] ; } } System . out . println ( " Principal ▁ Diagonal : " + principal ) ; System . out . println ( " Secondary ▁ Diagonal : " + secondary ) ; }
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