6.2. Conditional execution structures

Our first set of control structures deals with conditional execution. They all evaluate a Boolean test and make a choice about what to do next based on whether the result was true or false. None of these structures should come as a completely new experience to any Java developer, but of course Groovy adds some twists of its own. We will cover if statements, the conditional operator, switch statements, and assertions.

6.2.1. The humble if statement

Our first two structures act exactly the same way in Groovy as they do in Java, apart from the evaluation of the Boolean test itself. We start with if and if/else statements.