This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Core Javadoc and Libraries Javadoc.



example pic
boolean a = false; 
if (!a) { 
  rect(30, 20, 50, 50); 
a = true; 
if (a) { 
  line(20, 10, 90, 80); 
  line(20, 80, 90, 10); 
Description Datatype for the Boolean values true and false. It is common to use boolean values with control statements to determine the flow of a program. The first time a variable is written, it must be declared with a statement expressing its datatype.
boolean var
boolean var = booleanvalue
var variable name referencing the value
booleanvalue true or false
Updated on January 1, 2021 03:38:12am EST