Szathmáry László honlapja @ DEIK | Nim2 / Terminate the program and exit with an error code

In C: exit() from stdlib.h

In Python: exit or sys.exit()

In Nim: quit()

terminate with an exit code
def main(): n = int(input("Positive number: ")) if n < 1: print("Error: provide a positive number!") exit(1) # HERE # else: print("OK") if __name__ == "__main__": main()	import std/strutils # strip, split, join proc input(prompt: string = ""): string = stdout.write(prompt) stdin.readLine() proc main() = let n = input("Positive number: ").parseInt if n < 1: echo "Error: provide a positive number!" quit(1) # HERE # else echo "OK" when isMainModule: main()

Shorter form

The quit() function is overloaded, so you can also call it with an error message.

quit "bug" # message, exit code is 1 (default)

quit "bug", 3 # message, exit code is 3

The message (here: "bug") is printed on stderr.