while loops

Question

it's kind of confusing, i don't understand it

Answer 1

in short: while this is true, do something. If it's not true, it gets skipped
while (this is true) {
doSomething();
}

while I'm still dirty, shower
once I'm clean, i don't need to shower anymore so I'll move on with my day
If i was already clean, i can skip the shower

while (me.dirty == true) {
continueShower();
}
// move on with my day

while he is talking, listen
when he is done talking, listening is not required
If he wasn't talking in the first place, skip listening

while (he.isTalking == true) {
listen();
}
// don't have to listen to him

if the condition is false, then nothing happens

// he is not talking
he.isTalking = false

// i dont have to listen because he isn't talking
while(he.isTalking == true) listen();

// move on

Answer 2

think of it as a rearranged version of the for-loop.

pseudocode:

for( i=0; i<10; i++){
do things;
}

i=0;
while(i<10){
do things;
i++;
}