Function in C Programming Language

Function in C Programming Language

In this tutorial, we will discuss of the Function in C Programming Language

C functions

In the tutorial, We learn how to use functions in C language. generally, the function is a block of statement that together perform one of the specific tasks in C language similar to any programming languages etc java(called methods), C++(called methods)

Syntex in the function of C programming

return_type: The return_type is a data type of the value returned by the function. when use void data type, it never returns any value but any data type return the value eg – int

function_name:funtion_name helps to identify the function in C Programming. Every function should be a name because the function_name represent the unique function and function_name  use to call the function to need

parameter list: a function may contain a parameter and some functions may contain no parameter (it is optional) however when a funtion is invoked, pass a value to the parameter of the parameter list refer to the parameter type, parameter order, and number of parameters of the function.

Body of the function – the body of the function consist of group of statements that will be invoked when this function is called. Because a function contains a set of statements of for the unique purpose. we can call any function to my need of a group of the function of the program

Two type of function available in C Programming.

• Standard library function – pre-drfine function  – Already define and included compiler in C programming
• uder defined function – a function define the user to need

4 type of function available in C Language

1. No return without argument
2. No return with argument
3. Return without argument
4. Retunn with argment

1. Add two numbers using the function (No return without argument)

Program 1

#include <stdio.h>
#include <stdlib.h>
void main()
{
add();
return 0;
}
void add()
{
int a,b,c;
printf(“n Enter first number”);
scanf(“%d”,&a);
printf(“n Enter second number”);
scanf(“%d”,&b);
c=a+b;
printf(“Total value of c:%d”,c);
}

2. Different two numbers using function (No return with argument)

#include <stdio.h>
#include <stdlib.h>
void main()
{
    sub();//function call

    return 0;
}
void sub(int a,int b)
{
    printf("Enter first numbern");
    scanf("%d",&a);
    printf("Enter second numbern");
     scanf("%d",&b);
     int c;
     c=a-b;
    printf("Total value of c:%d",c);
}

#include <stdio.h>
#include <stdlib.h>
int main()
{
    printf("mul total: %d",mul());
    return 0;
}
int mul()
{
    int a,b,c;
    printf("Enter first numbern");
    scanf("%d",&a);
    printf("Enter second numbern");
     scanf("%d",&b);
     c=a*b;
    return(c);
}

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int result;
    result=add(100,50);
    printf("the result is :%d",result);
    return 0;
}
int add(int a,int b){
int temp;
temp=a+b;
return temp;

}