Functions in C - Programming

Functions in C - Programming

• 1.
  “FUNCTION IN C- Programming” PREPARED BY:- GAURANG VISHNOI
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  FUNCTION What is function? •A Function is a self contained block or a separate block of a statements which are kept together to perform a specific task in a related manner. • Every function must contain its definition as a group of related statements to perform specific task.
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  FUNCTION CALL • Alongwith the function definition function call is also important. • A function has no use without its function call. • A function can be called by any other function. • A function which calls any other function is called as caller function and the function which is being called is known as called function.
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  TYPES OF FUNCTION FUNCTION TYPE PRE- DEFINED USER DEFINED
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  PREDEFINED FUNCTION:- • Theseare predefined function in c compiler and their definitions are already available in header file. • Example- printf(), scanf(), pow(). • When ever we want to use these the function, instead of writing the whole code we just need to include the header file. USER DEIFINE FUNCTION:- • These are those function which are created by user
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  User define functionare of four type:- 1. No Argument No Return Type. 2. No Argument With Return Type. 3. With Argument No Return Type. 4. With Argument With Return Type. WHAT ARE ARGUMENTS? These are the data values which are passed from the caller function to the called function. TYPES OF ARGUMENTS:- 1. Actual Arguments. 2. Formal arguments
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  HOW FUNCTION WORKS •Statement in the function are not executed until the function is called • A function can be called by any other function. • A function which is calling any other function is known as caller function. • A function which is being called is known as called function
• 8.
  ON { ---------; ---------; ---------; ---------; ---------; ---------; ---------; --------; ---------; } OFF { ---------; ---------; ---------; ---------; ---------; ---------; ---------; --------; ---------; } CH ++/CH -- { ---------; ---------; ---------; ---------; ---------; ---------; ---------; --------; ---------; } VOL++/VOL-- { ---------; ---------; ---------; ---------; ---------; ---------; ---------; --------; ---------; }
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  ON OFF CH+ CH- VOL+ VOL-
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  THANK YOU…!!