EVA Programming Language

EVA is a minimalist, Lisp-inspired, s-expressive, interpreted object-oriented programming language that supports dynamic binding, arithmetic operations, conditional statements, and more.

Features

• Lisp-inspired syntax with S-expressions.
• Dynamic variable binding with var.
• Support for defining and calling functions with lambda and def.
• Basic arithmetic operations: +, -, *, /.
• Control flow with if, while, for, switch.
• Class and Object-Oriented programming with class, new, prop.
• Module system with module and import.

Installation

1. Clone the EVA repository.
2. Navigate to the project directory and run the following command to install dependencies:

   npm install

Usage

You can run EVA from the command line with the following syntax:

eva -e "(expression)"

Examples

1. Performing an Operation with a Lambda Function

This example calculates the square of 2 using a lambda function:

eva -e "(print ((lambda (x) (* x x)) 2))"

2. Defining a Variable and Printing It

This example creates a variable x with the value 10 and prints it:

eva -e "(var x 10) (print x)"

3. Performing an Arithmetic Operation with Variables

This example defines two variables x and y, performs an arithmetic operation, and prints the result:

eva -e "(var x 10)(var y 20)(print (+ (* x y) 30))"

5. Conditional Statements: if

This example uses an if expression to check if x is greater than 5 and prints the appropriate result:

eva -e "(var x 10) (print (if (> x 5) \"Greater than 5\" \"Less than or equal to 5\"))"

6. For Loop

This example uses a for loop to print the numbers from 1 to 5:

eva -e "(for (var x 1) (< x 6) (set x (+ x 1)) (print x))"

7. 9. Reading a File

To evaluate a script from a file, use the -f flag followed by the file path:

eva -f "path/to/your/file.eva"