Hello, World!

Tradition says language guides should start with a program that displays “Hello, World!” on the screen. Let’s oblige!

public fun main() {
  print("Hello, World!")
}

Every Hylo executable must define a main function, with no parameters. The return value can be either Void or Int32. Here, main contains a single statement, which is a call to a global function print with a string argument.

Note: The above program doesn’t work yet until strings are implemented, but here is a simpler example you can try:

public fun main() {
  let b = 4 + 38
  precondition(b == 42)
}

Once you have installed the compiler, you can also follow these steps:

Copy that main function into a file called hello.hylo.
Run hc hello.hylo, ./hello.