my first bash shell function doesn't work -

i tried 3 internet examples write bashe shell function , call via xterm terminal no success.

1-my functions saved in file "example" , file inexecutable mode.

2-inside example file wrote:

 #!/bin/bash             function quit {                exit            }            function hello {                echo hello!            }

3- in xterm terminal, in folder file located called these 2 functions in these ways:

$./quit     $./hello

and in way:

$quit     $hello

none of them work.but if change following function script (without function word) , call file, works.

any idea, going on?

thanks

you need source script load function definitions current shell environment:

# source script . example  # call function hello  # call function quit

Error