FUNCTION

Same task in repetition What is FUNCTION ? It is self contain block of statement that perform Same task in repetition

Collection of Function creates a C FUNCTION contains set of instructions enclosed by “{ }” which perform specific operation in c program. C Program Function Collection of Function creates a C Program

Uses :- FUNCTION Avoid rewriting same logic/code again & again No limit in calling function to make use of it We can call functions any no. of times & from any place in a program Dividing a big task into small pieces Function have re-usability FUNCTION

Function Declaration :- Return_type function_name(argument list); This informs complier about Function name , Function parameters and return value’s data type

This call the actual function Function call :- Function_name (argument list); This call the actual function

Output

Types of FUNCTION FUNCTION Library Function User Defined Function

How to call FUNCTION in a program ? Call by value Call by reference

All FUNCTION can be called either with arguments or without arguments in c program . And also these Function may or may not return value to the calling function.

FUNCTION with no argument & no return value FUNCTION with argument & no return value FUNCTION with argument & with return value

FUNCTION with no argument & no return value

Output

FUNCTION with argument & no return value

Output

FUNCTION with argument & with return value

Output