Shebang

While Acton is a compiled language and the actonc compiler produces an executable binary, script style execution is also possible through the use of a shebang line.

Source:

#!/usr/bin/env runacton

actor main(env):
    print("Hello World!")
    env.exit(0)

Ensure the executable bit is set and run your .act file directly:

chmod a+x hello.act
./hello.act

Output:

Hello Johan!