input output function in the C language

input output function in the C language

In this tutorial, we will discuss input output function in the C  language.

printf() scanf() function in C programming language

The C programming language provides various built-in functions(in-built library function ) for several purposes as a mathematical calculation, string manipulation and input-output operation and many more.

input-output function

input and output functions are very important and mostly used in the C programming language for input and output operation – to read any given data and to display information on the screen.

We must know about two input output functions as a lot of usage in C language for input and output task.

There are printf() and scanf() function

 

printf() function

In the C programming language, the printf() function is used to display the  character, string, integer, float data onto the output screen

The common pattern of  printf() function

printf("formated string",argument);

Example

printf("%d",a);

Usage of printf() function in C language

String output

Example

#include <stdio.h> //stdio.h header file contain definition of printf() function

int main()
{
    printf("code4coding.com is a coding site"); //display string content using printf() function
    return 0;
}

When the above code is executed, it produces the following results

code4coding.com is a coding site

 

Integer output

This is an example for integer output using printf() function in C language

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

int main()
{
    int age=34;
    printf("My age is: %d\n",age);
    getch();
    return 0;
}

When the above code is executed, it produces the following results

My age is: 34

float output

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

int main()
{
    float average=67.98;
    printf("My average is: %.2f\n",average);
    getch();
    return 0;
}

When the above code is executed, it produces the following results

My average is: 67.980003

 

Usage of scanf() function in C language

scanf() function

In the C programming language, the Scanf() function is used to read and store the character, string, numeric data as a standard input from the keyboard

Syntax

scanf("formated string",&argument);

Example

scanf("%d",a)

string input output

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

int main()
{
    char web[20];
    printf("Enter website name: \n");
    scanf("%s",web);//use scanf function for input
    printf("Your website name is: %s ",web);//use printf function for output
    getch();
    return 0;
}

When the above code is executed, it produces the following results

Enter website name:
codeforcoding.com
your website name is: codeforcoding.com

 

integer input output

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

int main()
{
    int age;
    printf("Enter your age: ");
    scanf("%d",&age);//use scanf() function for input
    printf("My age is: %d\n",age);//use printf() function for output
    getch();
    return 0;
}

When the above code is executed, it produces the following results

Enter your age: 23
My age is: 23

 

float input output

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

int main()
{
    float average;
    printf("Enter your average marks: ");
    scanf("%f",&average);//use scanf() function for input
    printf("My average is: %.2f\n",average);//use printf() function for output
    getch();
    return 0;
}

When the above code is executed, it produces the following results

Enter your average marks: 76.5
My average is: 76.50

Character input output

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

int main()
{
    char ch;
    printf("Enter a character: ");
    scanf("%c",&ch);//use scanf() function for input

    printf("your entered %c\n",ch);//use printf() function for output
    getch();
    return 0;
}

When the above code is executed, it produces the following results

Enter a character: A
you entered A

 

 

Suggested for you

gets() and puts() function in C

User defined function in C Language

Function in C Language with example

Arithmetic function in C Language