Some programming languages use constants, which are variables that are initialized at the beginning of a program and never changed. Which of the following are good uses for a constant?

1. To represent the mathematical value \(\pi\) (pi) as 3.14
2. To represent the current score in a game
3. To represent a known value such as the number of days in a week

Constants should never change in value, whereas variables may. Pi and the number of days in a week will never change. The score in a game may change.