What is difference between while loop and do-while loop ?

Question

Besides the difference in syntax, what exactly is the difference between these two and what are the conditions in which one would be preferred over the other?

Answer 1

I believe the difference is that the while loops runs zero times if a condition is already met, whereas a do-while loop runs at least once if a condition is met. As for which one is better, it depends on whether you want a loop to run at least one time or not.

Answer 2

The code block is ran in:
-while loop after condition is checked
-do-while loop before condition checked

Answer 3

Both loops repeat a statement or a set of statements.
In do while loop as the condition is written at end in syntax :
do{
statement
while(condition)}

so when we run the program , loop body statements will must execute at least once even if condition is not satisfied.
But in while loop , it depends all on condition and it will execute them only when condition is satisfied.