Polyglot CheatSheet - Main

Last Updated: 2023-03-01

C++

int main(int argc, char** argv) {
  // ...
  return 0;
}

• argc: argument count
• argv: argument vector

Java

Java code must live in a class.

class Foo {
  public static void main(String args[]) {
    // ...
  }
}

Python

if __name__ == "__main__":
  # running directly
else:
  # imported

Rust

use std::env

fn main(){
  for argument in env::args() {
    println!("{}", argument);
  }
}