do and while loops

OK, let's break it down:

1. Do - while loop: please Mr. JavaScript DO this ...the code....WHILE ( ...this thingy is still true ), aka:

   var num = 0;
   do {
   console.log(num);
   num++; /* this is very important, if you don't have something to change in the loop aka the num variable you will get an infinite loop and your browser will crash. With num++ each time the loop goes the num variable is adding +1 to it */
   }while(num < 10); /* here you check if the condition is still true or false. If it's true, it goes back up and executes the code inside the curly brackets, if false - loop ends and the program continiues */;
   

   NOTE! The do - while loop executes at least 1 time aka the code inside is executed ones - it runs, does what's inside the block and than checks if condition is true or not.

2. While loop: please Mr. JavaScript CHECK if this condition is true and IF it's true, do this, aka:

   var num = 10;
   while(num > 0){
   console.log(num);
   num--; /* same thing as the do-while loop, you need to change something in the block so that the condition eventually changes because otherwise you get an infinite loop and it crashes your browser again */
   }
   

   It's almost the same thing, but slightly different: you check your condition in the start, if it passes aka it's true, you execute the code in the block, if not, you skip everything in the curly braces and your program goes ahead. NOTE! If the condition of the while loop is wrong it never executes, see NOTE of the do-while loop.

That's it! :) Srry for my english I'm not that good at it :)