GALLERY

Aera, in small pieces.

Each example shows how Aera works in practice.

main.aera

fn main() {    println("Hello world!")}

Main function

In Aera, the main function represents the entry point for code execution.

sum.aera

fn sum(a: int64, b: int64) -> int64 {    a + b}

Functions are defined with the fn keyword. Type annotations, including the return type are optional.

choose.aera

let hour = 18 let greeting = if hour < 17 {    "good day"} else {    "good evening"}

if is an expression, meaning it produces a value you can bind to with the let keyword.

rec.aera

fn factorial(n: int32) -> int32 {    if n <= 1 {        1     }     else {        n * factorial(n - 1)    }               }

Aera supports recursion, allowing functions to call themselves.