C++

Question

Why in C++
Sum=a+b;
Cout<<sum<<end; is instead of cout<<a+b;

Answer 1

kamran hassan Depends on your program. If you are going to use the value of the sum of a and b a lot, might as well store it in a variable and avoid recomputation. In the above context, it doesn't make much difference.

Answer 2

why do you use variable ? so that it can be changed easily. consider that you have to output sum like hundreds of time.suddenly you need to add or remove a number from every output and print updated sum. would you do it hundreds of times or update the definition of variable sum.. This is just scenerio.

Answer 3

the sum is a variable that store the sum of a+b

Answer 4

which is best to use
Sum=a+b;
Cout<<sum<<end;
or cout<<a+b;

Answer 5

kamran hassan cout<<sum<<end;

Answer 6

why