I am wondering if this a no output no input function. If it is not what type of function is it?

%Lunch
function Lunch

imread('Lunchmenu.jpg');
imshow('Lunchmenu.jpg');

Answer 1

[DGM]

It certainly doesn't have any input or output arguments, but reading the file with imread() is redundant if using that syntax with imshow(). This line does nothing:

imread('Lunchmenu.jpg');

Answer 2

[Adam Danz]

Functions do not have to have inputs or outputs.

For example, this function below searches for invisible figures and makes them visible,

function invisibleFigToggle()
    figs = findall(0,'type','figure','visible','off');
    set(figs,'visible','on')
end

Your function reads an image and displays it in a the current figure or creates the current figure.

It's a poorly written function, though.

• What if 'Lunchmenu.jpg' doesn't exist?
• What if an unrelated figure already exists?
• The function name is really bad and does not describe what the function does.
• It's not clear why those two lines needs to be within a function.

Answer 3

[Abdul Basith Ashraf]

Its basically a script.

It is as good as having a file named "Lunch.m" having the two lines:

imread('Lunchmenu.jpg');
imshow('Lunchmenu.jpg');

And you call

Lunch

in the main code