Conditional Operator

When the only operation being performed inside of an if and else pair is setting the initial value of a variable, you can use the "conditional operator"¹ to perform that assignment instead.

void main() {
int age = 22;

String message = age < 25
    ? "You cannot rent a car!"
    : "You might be able to rent a car";

System.out.println(message);
}

You write a condition followed by a ?, a value to use when that condition evaluates to true, a :, and then a value to use when that condition evaluates to false.

CONDITION ? WHEN_TRUE : WHEN_FALSE