Function in C language.

Learn programming for free

Function in C language.

Function is basically a block of statement which is used to perform some specific task.

In c language we have 4 type of function.When we declare a function then it tells the compiler about return type of function,parameter of function and it's function name.

In C language we divide large program into blocks and call them as and when they required.

We will discuss function in depth in this blog.

Types of function.

1. Function without parameter and without return type.
2. Function without parameter and with return type.
3. Function with parameter and without return type.
4. Function with parameter and with return type.

We will discuss each of them with very basic example:

1.Function without parameter and without return type:

#include<stdio.h>

void sum()

{

int a,b,sum=0;

printf("Enter first number");

scanf("%d",&a);

printf("Enter second number");

scanf("%d",&b);

sum = a+b;

printf("Sum of two number is %d",sum);

}

int main()

{ 

sum();

return 0; 

}

2.Function without parameter and with return type:

#include<stdio.h>

int sum()

{

int a,b,sum=0;

printf("Enter first number");

scanf("%d",&a);

printf("Enter second number");

scanf("%d",&b);

sum = a+b;

return sum;

}

int main()

{ 

int x = sum();

printf("Sum of number is: %d",x);

return 0; 

}

3.Function with parameter and without return type:

#include<stdio.h>

void sum(int a,int b)

{

int sum = a+b;

printf("Sum of number is %d",sum);

}

int main()

{ 

int a,b;

printf("Enter first number");

scanf("%d",&a);

printf("Enter second number");

scanf("%d",&b);

sum(a,b);

return 0; 

}

4.Function with parameter and with return type:

#include<stdio.h>

int sum(int a,int b)

{

int sum = a+b;

return sum;

}

int main()

{ 

int a,b,x = 0;

printf("Enter first number");

scanf("%d",&a);

printf("Enter second number");

scanf("%d",&b);

x = sum(a,b);

printf("Sum of number is %d",x);

return 0; 

}

Do you want to learn c language in depth then visit:  learn c language in depth.

Share this

Learn programming for free