NAME 

return - stop the innermost currently evaluated function

Synopsis 

function NAME; [COMMANDS...;] return [STATUS]; [COMMANDS...;] end

Description 

The return builtin is used to halt a currently running function. It is usually added inside of a conditional block such as an if statement or a switch statement to conditionally stop the executing function and return to the caller, but it can also be used to specify the exit status of a function.
*
STATUS is the return status of the function. If unspecified, the status is unchanged.

Example 

The following code is an implementation of the false command as a fish function
function false
        return 1
end