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C: 11. Functions

 

A function is a group of statements that together perform a task. Every C program has at least one function, which is main(), A function can be called multiple times to provide reusability and modularity to the C program. 

Function Aspects:- 

  1. Function declaration A function must be declared globally in a c program to tell the compiler about the function name, function parameters, and return type.
  2. Function call Function can be called from anywhere in the program. The parameter list must not differ in function calling and function declaration.
  3. Function definition It contains the actual statements which are to be executed. It is the most important aspect to which the control comes when the function is called.
Example:- 

#include<stdio.h>  
void printName();  
void main ()  
{  
    printf("Hello ");  
    printName();  
}  
void printName()  
{  
    printf("Javatpoint");  
}  
Output:- 
Hello Javatpoint

Exercises:-
  1. Try the previous codes by using functions

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