Simple random string question

Processing Coding Questions
3

thank you for replying again:), I keep getting a string index error so I added the i<wordlength() aspect but i keep getting the same error. I also never new about that aspect of the draw function!

int x;
int y;
String word="";
int i=0;
void setup() {
  size(500, 500);
}
void draw() {
  x=int(random(25, 450));
  y=int(random(25, 450));
  textSize(25);
  fill(0);
  text(word.charAt(i), x, y);
  if(frameCount % 10 == 0 && i<word.length()) 
   i++;
  
}
void keyPressed() {
  word+=key;
}