boolean Data Primitive Web & Application boolean.gif boolean a = false; if (!a) { rect(30, 20, 50, 50); } a = true; if (a) { line(20, 10, 90, 80); line(20, 80, 90, 10); } Datatype for the Boolean values true and false. It is common to use booleanvalues 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 true false 1.0 Datatype PDE