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Should a function always return something?
Answer. NO, a function does not always have to have an explicit return statement. If the function doesn’t need to provide any results to the calling point, then the return is not needed.
Do methods have to return something?
Any method declared void doesn’t return a value. It does not need to contain a return statement, but it may do so. The data type of the return value must match the method’s declared return type; you can’t return an integer value from a method declared to return a boolean.
Do all functions return something?
All JavaScript functions return something. If an explicit return is omitted, undefined is returned automatically instead. When a function returns, its instance is wiped out from memory, which also frees all the variables in its scope to be wiped out if nothing else points to them.
What happens when an object is returned from a function?
When an object is returned by value from a function, a temporary object is created within the function, which holds the return value. This value is further assigned to another object in the calling function.
How to return an object of any type?
O object = unserialize (file); // return object; } Any suggestions on how to accomplish this is highly appreciated! public Object function (…) That way the return type will always be of type Object (since all objects are descendants of Object ), so they will be accepted.
Which is the return type of a function?
As the return type of function is weight (an object of class weight), a temporary object temp is created within the function for holding return values. These values are accessed as temp kilogram and temp gram by the function.
Can a reference to a function be returned?
However, a reference to the local object (object declared inside the function) cannot be returned from the function since a reference to local data points to data within the function. Hence, when the function terminates and local data is destroyed, this reference points to nothing.