A function is a self-contained block or a sub-program of one or more statements that perform a
special task when called.
Why use Functions
1) If we want to perform a task repeatedly then it is not necessary to rewrite the particular block of
a program again and again. Shift the particular block of statements in a user-defined function.
The function defined can be called any number of times to perform the task.
2) Using functions, large programs can be reduced to smaller ones. It is easy to debug and find out
the errors in it. It also increases readability.
How a Function Works
1) Once a functi ...
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