Plz help me why and how sum+= is used?

Answer 1

sum+=xyz is normally used as a shorthand for sum = sum + xyz.

what do you want to know?

Answer 2

it is used whenever some variable needs to be incremented by more than 1 or by one or more other values. that is for numerical types.

where += is overloaded, you best consult the source code.

Answer 3

I want to know how this is used in a program I know what it mean but How and when it can be used in program ,can you tell me?thankyiu

Answer 4

thnx bro