README.md

actively building the alpha-v0.1 version

ego

ego is an interpreted and dynamically typed programming language that runs on self virtual machine. to start running ego, the compiler and self must be installed locally using cargo install --git https://github.com/ego-programming-language/ego.git.

the fastest way to get a hello world in ego is by:

ego new hello_world
cd hello_world
ego run

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.