Why use a “do while” loop? [closed]

Answer 1

do while will run at least once - letting you do, while... where as while requires the condition met to start at all..

var i = 6;
do{
    alert(i);
}while( i < 5)

// alerts 6, but while criteria isn't met so it stops

var i = 6;
while( i < 5) {
  alert(i);
}

// no output - while condition wasn't met