Help me understand the return statement in the nested function.

Question

function showName(firstName,lastName) {
var nameIntro = "This is ";
function displayName() {
return nameIntro + firstName + " " + lastName;
}
return displayName();
}

Answer 1

what if I just remove the return displayName() and use displayName();

Answer 2

Thanks, that was helpful..

Answer 3

Here, the inner function displayName is defined within the function showName, but it is not called until you get to the return displayName(); statement. At which point the inner function returns (nameIntro + firstName + " " + lastName;) to the outer functions return statement which will then return to where the outer function showName was called.

Answer 4

function showName(firstName, lastName) {
return "This is " + firstName + " " + lastName;
}

This is essentially the same thing. Provided there isn't a call somewhere else to the inner function itself. Similar to:

showName(firstName, lastName).displayName();