Outcome is not showing in Julia when I use 'function' command

If I use ‘print’ command, ‘hello world’ is showing in Julia.
But, use ‘function’ command to calculate sphere volume, nothing happens in Julia.
Could you tell me what would be wrong? (I just used copy and paste example from web.)

Nothing is wrong. Juno shows things like function declaration and values where you execute it (the little box under the function).

Okay, I got it. Thank you!!