text: Returns value of " arr [ 0 ] ▁ & ▁ arr [ 1 ] ▁ + ▁ arr [ 0 ] ▁ & ▁ arr [ 2 ] ▁ + ▁ . . . ▁ arr [ i ] ▁ & ▁ arr [ j ] ▁ + ▁ . . . . . ▁ arr [ n - 2 ] ▁ & ▁ arr [ n - 1 ] "
code: int pairAndSum ( int arr [ ] , int n ) {