It is a statement; you can create a loop with it:
while (<condition>) <statement>
I don't use that function in C programme.
Yes
This function is obsolete. Do not use it.
Because if you donot use main function in c program, the compiler willnot execute the program.C compiler starts execution from main function itself.
There is no such thing as function overloading in C; that is a feature of C++. Function overloading allows us to provide two or more implementations of the same function. Typically, we use function overloading so that the same function can cater for different types. For instance, we might provide one implementation that is optimised to handle an integer argument while another is optimised to handle a real argument. We can also use function overloading to provide a common implementation of a function which can then be invoked by overloads that handle the low-level type conversions.
Function
To specify the return-type of the function.
You can use the pow() function in math.h.
Where there is no need to return any type of value from a function
using function we can call the function in the program any where. by using functions we can reduce the code redundancy
You can use ImageMagick library and use 'convolve' function.
You cannot have a function named else, because it is a reserved word.