Defining Variables, Constants, and Functions¶

In Beremiz, defining variables, constants, and functions can significantly enhance the readability and maintainability of your code. This section explains how to define and use these elements.

Defining Variables¶

Variables in Beremiz are defined and redefined using the set keyword. Unlike constants, variables can be reassigned with new values at any time.

Syntax:¶

1	`<value> <variable_name> set`

Example:¶

42 magic set
magic show   # Output: 42

"don't panic!" magic set
magic show   # Output: "don't panic!"

Defining Constants¶

Constants in Beremiz are defined using the define keyword followed by the constant's name, its value, and the end keyword. Constants are immutable once set, providing a reliable way to use fixed values throughout your code.

Syntax:¶

1	`define <constant_name> <value> end`

Example:¶

1 2	`define name "Magdiel" end define age 22 end`

Usage:¶

1 2	`name # Pushes "Magdiel" onto the stack age # Pushes 22 onto the stack`

Defining Functions¶

Functions in Beremiz are also defined using the define keyword, followed by the function's name, its body, and the end keyword. Functions allow you to encapsulate reusable logic within your code.

Syntax:¶

1
2
3

define <function_name>
    <function_body>
end

Example:¶

1
2
3

define dupl
    2 *
end

Usage:¶

1	`5 dupl # Multiplies 5 by 2 and adds the result to the stack`

Example of Using Constants and Functions¶

By combining constants and functions, you can create more complex and reusable expressions. Here's an example that demonstrates how to use both constants and functions effectively:

Example:¶

define name "Magdiel" end
define half_age 11 end

define dupl
    2 *
end

name            # Pushes "Magdiel" onto the stack
half_age dupl   # Multiplies half_age by 2 and adds the result to the stack

"Hi, I'm $1 and I have $0" show   # Output: "Hi, I'm Magdiel and I have 22"

In this example: - name is a constant representing a string. - half_age is a constant representing a numerical value. - dupl is a function that doubles its input. - The expression "Hi, I'm $1 and I have $0" show uses these constants and the function to produce a formatted output.

Differences Between `define` and `set`¶

define: Used to create constants and functions. The value assigned cannot be changed after the initial definition.
set: Used to create or update variables. Variables can be reassigned with new values as needed.

Defining Variables, Constants, and Functions¶