Trouble understanding the boolean function

I'm just starting to learn c++ and I'm having trouble understanding the boolean function.

srand(time(0));  for(ctr = 0; ctr < amt; ctr++){                            do{                                  unique = false;                                   let[ctr] = (char)(rand() % 26 + 65);                               for(check = 0; check < ctr; check++){            if(let[ctr] == let[unique]){              unique = true;            }         }      }while(unique);         cout<<let[ctr]<<" ";  }            

Its suppose to randomly generate a set amount of letters and the do-while makes sure that there isn't a duplicate letter. I can't seem to understand how does it know if there is a duplicate letter and how does it eliminate it.

https://stackoverflow.com/questions/67042133/trouble-understanding-the-boolean-function April 11, 2021 at 02:39PM