'do...while' vs. 'while'
c, c#, c++, do-while, while-loop
Solution
If you always want the loop to execute at least once. It's not common, but I do use it from time to time. One case where you might want to use it is trying to access a resource that could require a retry, e.g.
do
{
try to access resource...
put up message box with retry option
} while (user says retry);
Problem
Possible Duplicates: While vs. Do While When should I use do-while instead of while loops? I've been programming for a while now (2 years work + 4.5 years degree + 1 year pre-college), and I've never used a do-while loop short of being forced to in the Introduction to Programming course. I have a growing feeling that I'm doing programming wrong if I never run into something so fundamental. Could it be that I just haven't run into the correct circumstances? What are some examples where it would be necessary to use a do-while instead of a while? (My schooling was almost all in C/C++ and my work is in C#, so if there is another language where it absolutely makes sense because do-whiles work differently, then these questions don't really apply.) To clarify...I know the difference between a `while` and a `do-while`. While checks the exit condition and then performs tasks. `do-while` performs tasks and then checks exit condition.