Learn: Variables vs Constants

Welcome!Today we’ll explore Variables and Constants, two key programming concepts. By the end of this lesson, you'll know the difference and how to use them effectively in your programs.

What are Variables?A variable is a named storage location in memory that can hold a value. The value of a variable can change as your program runs. For example, you could use a variable to store a user's score in a game, which increases as they play.

What are Constants?A constant is a named storage location in memory that holds a value that does not change during program execution. For example, you might use a constant to store the maximum score in a game or the value of pi (3.14).

Why are Variables and Constants Important?Using variables allows programs to store and manipulate changing data like user input or scores. Constants ensure important values, like fixed settings or mathematical values, remain unchanged, making programs more reliable and easier to understand.

How to Use Variables and Constants?In programming, you create variables to store data that changes. Constants are used for values that must stay the same. For example, you could define a variable for a player's score and a constant for the game's maximum score.

Review Time!Great work! You’ve learned the differences between variables and constants, their purposes, and how to use them in programming. Let’s test your understanding now.