GeezerVison

null

Special value used to signify the target is not a valid data element. In Processing, you may run across the keyword null when trying to access data which is not there.

• String content = "It is a beautiful day.";
  String[] results;  // Declare empty String array
  
  results = match(content, "orange");
  // The match statement above will fail to find
  // the word "orange" in the String 'content', so
  // it will return a null value to 'results'.
  
  if (results == null) {
    println("Value of 'results' is null.");  // This line is printed
  } else {
    println("Value of 'results' is not null!");  // This line is not printed
  }