Basic Input/Output C Program

Basic Input/Output C Program

Example 1.

#include<stdio.h> // header file for standard input & output functions

// main function of the program which execute first in every program - starting point

int main()

{

printf("Hello World\n");

// an integer variable declaration

int x;

    
    // Read a value from standard input

scanf("%d", &x);

// Write value to the standard output

printf("%d\n", x);

// return 0 tells that program executed successfully

return 0;

}

Example 2.

 

#include<stdio.h>

int main()

{

int x=5;

printf("X data is=%d\n", x);

int y=7;

printf("Y data is=%d\n", y);

y=50;

printf("Y data is=%d\n", y);

printf("Address of X is=%u\n", &x);

return 0;

}

Note :- A variable with '&' in prefix represents the address of that variable.

e.g. int x; // variable declaration

                    '&x' // represents address of the variable x

Related Topics :

Array in C

Check a Prime Number