This demo shows a simple method that takes in two inputs and returns the average:

private double average(double a, double b)

Solution

public class AverageMethod extends ConsoleProgram {
    public void run() {
        println(average(45));
        println(average(102));
        println(average(-4.19.8));
    }
    private double average(double adouble b) {
        return (a + b) / 2;
    }
}
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