Practice›Java Fundamentals›Module 3. Methods ›3.3 Return values

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3.3 Methods — using the returned value

Lesson

Doing something with the result

A returned value is just a value — you can store it in a variable, use it inside a bigger expression, print it, or pass it straight to another method. Wherever a value of that type fits, a method call that returns it fits too.

Worked example

// square(int n) returns n * n
int r = square(5);            // store it: r is 25
System.out.println(r + 1);    // use it in math: 26
System.out.println(square(2) * square(3));  // 4 * 9 = 36

▶ Try it: run this — the returned values are stored and combined. Change the numbers and re-run.

public class Main {
    static int square(int n) {
        return n * n;
    }
    public static void main(String[] args) {
        int r = square(5);
        System.out.println(r + 1);
        System.out.println(square(2) * square(3));
    }
}

square returns n * n. What does this print?

int x = square(3);
System.out.println(x + 1);

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square returns n * n. Type what this prints:

System.out.println(square(2) * square(3));

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A value returned by a method can be...

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True or false?

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