Skip to content

Constants

Constants are values that will stay the same while the robot runs, such as wheel sizes and motor ports. They're a useful way to change specific aspects of the robot without being familiar with the code for those components, which makes them essential in a team setting. They're all stored in Constants.java to make it even more convenient.

Changing constants

This is pretty much just common sense. 1. Open Constants.java. 2. Find the constant you want to edit. The provided sections should help you. 3. Change its value.

Adding constants

This is also pretty simple. 1. Open Constants.java. 2. Locate the section your constant should go in. (You can create one if needed -- just copy the heading from another section.) 3. At the bottom of the section, type public static final TYPE NAME = VALUE;, where TYPE is the data type, NAME is whatever you want to name your constant, and VALUE is the value of your constant.

Using constants

  1. Open the file you want to use the constant in.
  2. In the imports area, type import frc.robot.Constants.NAME;, where NAME is the name of the constant.
  3. Whenever you need the constant's value, simply type the constant's name.

Alternatively, you can just import all of the constants right away by typing import frc.robot.Constants. Then, just type Constants. before typing your constant's name. Whether or not you do this is up to personal preference.

If you've read every article up to this point, you've learned the basics of FRC programming! All that's left is putting it into practice with specific components of the robot. Get started by learning about programming motors. For any components not documented in this wiki, you should be able to figure out how to program them by either looking at current/previous years' programming of them or looking up the official documentation.