noreplydev / ego

the programming language

actively building the alpha-v0.1 version

ego

ego is an interpreted and dynamically typed programming language. To start writting ego the interpreter must be installed locally using for example cargo install --git https://github.com/noreplydev/ego.git. So you would need to clone the repo and create a build for your targeted OS.

After that, you will need to create an ego project. To start just type:

ego new hello_world

And that's it, you can cd the project like cd <package_name> and run with:

cd hello_world
ego run

You will see something like this in your terminal

Hello, world!

You can also run ego using the self virtual machine using -vm flag

As ego is in an experimental phase you can always debug the lexer tokens and the parser generated AST using the -d flag, like so:

ego run main.ego -d

Expressions

Ego has expressions interpretation so you can make

let string = "Number: "
let sum = (2 + 2) * 2
let result = string + sum + "."

print(result)

After running with ego cli, you will see something like this in your terminal

Number: 8.

Conditionals

Ego supports conditional execution so you could try

if true {
  print("Executed")
} else {
  print("Not executed")
}

You can change the condition to false to see how the else code block is executed.

Loops

Ego has just one iteration construct. A while loop. That's it.

let x = 0

while x < 10 {
  print(x)
  x = x + 1
}

Functions

You can define a function in Ego using the fn keyword followed by an identifier, arguments and a code block.

fn greet_user(name) {
  return "Hi, " + name 
}

let greet = greet_user("Cristian")
print(greet)

Which outputs:

Hi, Cristian

You might be thinking what happens if we don't pass the name argument. Let's try it:

fn greet(name) {
  print("Hi, "+name)
}

greet()

Hi, nothing

The ego data type for not defined values is Nothing.