Difference between “while” loop and “do while” loop

Question

What is the difference between while loop and do while loop. I used to think both are completely same.Then I came across following piece of code:

do {
                


        

Answer 1

While Loop:

while(test-condition)
{
      statements;
      increment/decrement;
}

1. Lower Execution Time and Speed
2. Entry Conditioned Loop
3. No fixed number of iterations

Do While Loop:

do
{
      statements;
      increment/decrement;
}while(test-condition);

1. Higher Execution Time and Speed
2. Exit Conditioned Loop
3. Minimum one number of iteration

Find out more on this topic here: Difference Between While and Do While Loop

This is valid for C programming, Java programming and other languages as well because the concepts remain the same, only the syntax changes.

Also, another small but a differentiating factor to note is that the do while loop consists of a semicolon at the end of the while condition.