Methods

So far you've learned to store data and make decisions. But what happens when you need to do the same task multiple times? Methods (also called functions) let you package up code into reusable blocks that you can call whenever you need them.

Example:`

// Define the method
public void sayHello() {
    telemetry.addLine("Hello, FTC team!");
}

// Call the method
sayHello(); // Prints: Hello, FTC team!

Method Structure

Every method has the same basic parts:

accesMod returnType methodName(parameters) {
    // Code that does the work
    return someValue; // Only if returnType isn't void
}

• accesMod - Can either be public or private. Determines whether other parts of your program can use this method or not.
• returnType - What type of data this method gives back (or void for nothing)
• methodName - What you call this method
• parameters - Data you pass into the method (optional)

Methods That Don't Return Anything

These methods do work but don't give you back a value. They use void as the return type:

    public void disableSliders(){
        left.setMotorDisable();
        right.setMotorDisable();
    }

Methods That Return Values

These methods calculate something and give you back the result:

public static double getY() {return y;}

tip

When a method returns a value, you usually want to store that value in a variable or use it in an expression.

Methods With Parameters

Parameters let you pass information into your methods to make them more flexible:

public void setPowerVec(Vector vector){
        //Apply power
        frontLeft.setPower((powerVector.getX() + powerVector.getY() + powerVector.getZ()));
        frontRight.setPower((powerVector.getX() - powerVector.getY() - powerVector.getZ()));
        backLeft.setPower((powerVector.getX() - powerVector.getY() + powerVector.getZ()));
        backRight.setPower((powerVector.getX() + powerVector.getY() - powerVector.getZ()));
    }

Multiple Parameters

Methods can take several parameters separated by commas:

public void moveToPosition(double x, double y, double power) {
    //Code to move robot to certain position
}

Quick Reference

Method Type	Example	When to Use
Void (no return)	public void moveForward()	Performing actions
Return value	public int getScore()	Calculating/getting data
With parameters	public void turn(double degrees)	Flexible, reusable actions
Multiple parameters	public void move(double x, double y)	Complex operations