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 program in Val must define a main function, with no parameters and no return value, as its entry point. Here, main contains single statement, which is a call to a global function print with a string argument.
The standard library vends an API to interact with the program's environment. Command line arguments are accessed by reading a constant named Environment.arguments. Return statuses are signalued by calling the global function exit(status:).
To run this program:
Copy that main function into a file called Hello.val.
Run the command valc Hello.val -o hello.
Run the command ./hello to run the executable.
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Last modified 6mo ago