But in the other hand the Functions those are developed by the user for their Programs are known as User Defined Programs. When a user wants to make his Own Function, then he must have to follow the Following Operations.
1) Function Declaration or Prototyping
2) Function Defining
3) Calling a Function
1) Function Declaration or Prototyping:For using a Function a user must have to declare a Function. The Function declaration contains the Name of Function, Return type of the Function and also the Number of Arguments that a User will takes for performing the Operation.
The Function Prototyping Contains
1) Return Type of a function: The Return Function determines whether a Function will return any value to the Function. If a Function is declared with the void Keyword or if a Function Contains a void then that’s means a Function Never Returns a value. Means a Function will Executes his statements one by one. And if a Function Contain any other data type means if a Function Contains int or Float then the Function must return a value to the user.
2) Name of Function : The Name of Function must be valid and the name of function must be Start from any Alphabet and the Name of Function doesn’t Contains any Spaces and the Doesn’t Contains any Special Character For Example Space , * sign etc.
3) Argument List: A Function may have zero or More Arguments. So that if we want to call a Function. Then we must have to Supply Some Arguments or we must have to pass some values those are also called as the Argument List. So that The Argument List is the total Number of Arguments or the Parameters those a Function Will takes. So that We must have Supply Some Arguments to the Functions,. The Arguments those are used by the Function Calling are known as the Actual Arguments and the Arguments those are used in the Function declaration are Known as the Formal Arguments, When we call any Function then the Actual Arguments will Match the Formal Arguments and if a proper Match is Found, then this will Executes the Statements of the Function otherwise this will gives you an error Message.
Functions
1) Function Declaration or Prototyping
2) Function Defining
3) Calling a Function
1) Function Declaration or Prototyping:For using a Function a user must have to declare a Function. The Function declaration contains the Name of Function, Return type of the Function and also the Number of Arguments that a User will takes for performing the Operation.
The Function Prototyping Contains
1) Return Type of a function: The Return Function determines whether a Function will return any value to the Function. If a Function is declared with the void Keyword or if a Function Contains a void then that’s means a Function Never Returns a value. Means a Function will Executes his statements one by one. And if a Function Contain any other data type means if a Function Contains int or Float then the Function must return a value to the user.
2) Name of Function : The Name of Function must be valid and the name of function must be Start from any Alphabet and the Name of Function doesn’t Contains any Spaces and the Doesn’t Contains any Special Character For Example Space , * sign etc.
3) Argument List: A Function may have zero or More Arguments. So that if we want to call a Function. Then we must have to Supply Some Arguments or we must have to pass some values those are also called as the Argument List. So that The Argument List is the total Number of Arguments or the Parameters those a Function Will takes. So that We must have Supply Some Arguments to the Functions,. The Arguments those are used by the Function Calling are known as the Actual Arguments and the Arguments those are used in the Function declaration are Known as the Formal Arguments, When we call any Function then the Actual Arguments will Match the Formal Arguments and if a proper Match is Found, then this will Executes the Statements of the Function otherwise this will gives you an error Message.
Functions
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