Functions in C language - Data Structures examples

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FUNCTIONS IN C LANGUAGE

 Self contained block of 1 or more statements or a sub program which is designed for particular task is known an function.

 ADVANTAGES
  • Module approach:  by using functions we can develop the application in module format i.e. procedure oriented language concept.
  • Resuability: By using functions we can create resuability blocks.
  • By using functions we can easily debug the program.
  • code - maintainance When we are developing the application by using functions then it is easy to maintain code for future enhancement.
PROPERTIES
  • The basic purpose of function is reuse.
  • A c programming is colloctions of functions.
  • Always compilation process will take place from top to bottom.
  • Execution process starts from main and ends with main only.
  • When we are working with functions, functions can be defined randomly.
  • Declaration of function means required to specify  return type, name of the function& parameter type information.
  • In function definition first line is called function header/ function prototype.
  • Always function declaration must be required to match with the function declaration.
  • When the function is not returning any value then specify the return type as void.
  • Void means nothing i.e. no return type.
  • Default parameter type of function is void.

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