How can I remove the last comma from a loop in C++ in a simple way?

Question

This program is for printing prime numbers till the input given and separating every prime number with a comma.

void main(){

    int N, counter=0, isPrime;
         


        

Answer 1

To easily remove the last comma you can use the '\b' character.

for(auto item : vec)
    std::cout << item << ", " ;
std::cout << "\b\b " << std::endl;