Practice›Java Fundamentals›Module 3. Methods ›3.2 Parameters

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3.2 Methods — several parameters

Lesson

More than one parameter

A method can take several parameters, separated by commas. Each argument you pass is matched to a parameter by position — first to first, second to second. So the order of the arguments matters.

Worked example

void minus(int a, int b) {
    System.out.println(a - b);
}

minus(10, 3);   // 7
minus(3, 10);   // -7

Same method, swapped arguments, different result — because a and b are filled by position.

▶ Try it: minus(int a, int b) prints a - b. Run this, then swap the two numbers and re-run — the answer changes sign.

public class Main {
    static void minus(int a, int b) {
        System.out.println(a - b);
    }
    public static void main(String[] args) {
        minus(10, 3);
    }
}

showScore(String p, int pts) prints p, then : , then pts. What does showScore("Ada", 5) print?

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minus(int a, int b) prints a - b. What does minus(3, 10) print?

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For box(int w, int h) called as box(4, 2), match each parameter to the value it receives.

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True or false?

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Type exactly what this program prints.

public class Main {
    static void plus(int a, int b) {
        System.out.println(a + b);
    }
    public static void main(String[] args) {
        plus(2, 5);
        plus(5, 2);
    }
}

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