Help for while loop

maddoxfenomeno

I am trying to add a while loop to my code .

Something like while ENTER is pressed println "you are pressing enter" .

Can someone please help me ?

Is this code goes into the void draw() ?

What would the code be for that ?

Chrisir

See the reference for while

and for keyPressed and key

It won’t work in my opinion. Draw() updates keyPressed only at the end of draw and not during while. iirc

But try

int i=0;

while (i<10) {

println(i);

i++;

}

println („done“); use normal „“ here

TfGuy44

You should not use a while loop. You should use a boolean and an if statement.

boolean enterPressed;

void setup(){
  size(200,200);
}

void draw(){
  background(0);
  if( enterPressed ){
    text("ENTER", 100, 100);
  }
}

void keyPressed(){
  if( keyCode == ENTER ){
    enterPressed = true;
  }
}

void keyReleased(){
  if( keyCode == ENTER ){
    enterPressed = false;
  }
}

jeremydouglass

To explain more why the first approach won't work:

1. The keypressed variable is updated at the end of the draw loop.
2. If you check it during the draw loop, it will either be true or false -- and that won't change.
3. If it is true, your while loop will go on forever -- letting go of the key won't change anything, as it won't be update until the end of draw, and it will never exit the while loop to get to the end of draw.