Q: Please explain Self Invoking Function and its syntax.

Answer:

Functions that are automatically invoked are termed as Self Invoking Functions. These are also known as Immediately Invoked Function Expressions and Self Executing Anonymous Functions. The general syntax of a Self Invoking Function is:

(some_function () { return () }) ();

Typically, a function is defined and then invoked. However, if there is a need to execute a function automatically at the place where it is given and it needs not to be called again then anonymous functions can be used. Such functions have no name, and thus the name.