What will be the value of sum after the following program is executed?

void main()
{
   int sum=1, index = 9;
   do{
      index = index – 1;
      sum *= 2;
   }while( index > 9 );
}

the program ran successfully and terminated. because there is not any printing statement for anything.

It is property of do-while loop to get executed at least once irrespective of condition.
here the value of index is initially 9.
when this goes int do-while loop it gets decremented by 1 as index=index-1;
then sum *=2 is executed which can be expanded as sum=sum*2;
so sum becomes 2;
when condition is checked index=8 so 8>9 becomes false,
thus finally value of sum becomes 2.

how

give explaination of this program