C Basic C Program in C Programming

Basic C Program In C programming Language

C Program to Print "Hello World!"

#include <stdio.h> #include <conio.h> void main() {    printf ("Hello World!");    getch(); }

Output: Hello World

C Program to Print a number or integer

#include <stdio.h> #include <conio.h> void main() {      int n;  printf("Enter a number or integer: ");   scanf("%d", &n);  printf("You entered number or integer is: %d", n);        getch(); }

Output: Enter a number or integer: 20 You entered number or integer: 20

C Program to Print sum of two number

#include <stdio.h> #include <conio.h>  void main()  {        int a, b, c;     printf("Enter two number: ");     scanf("%d %d", &a, &b);     c = a + b;          printf("The sum is = %d", c);     getch(); }

Output: Enter two number: 10 12 The sum is = 22

C Program to Print to addition, subtraction, multiply and division of two number Or C Program to make a simple or arithmetic calculator

#include <stdio.h> #include <conio.h>  void main()  {        int a, b, c;     printf("Enter two number: ");     scanf("%d %d", &a, &b);     c = a + b;          c = a -  b;          c = a * b;          c = a / b;      printf("The addition is = %d", c); printf("The subtraction is = %d", c); printf("The multiplication is = %d", c); printf("The division is = %d", c);    getch(); }

Output: Enter two number:12 6 The addition is = 18 The subtraction is = 6 The multiplication is =72 The division is =2

C Program to Print ASCII Value

#include <stdio.h> #include <conio.h>  void main()  {      char a;     printf("Enter a  valid character: ");     scanf ("%c", &a);  printf("ASCII value of  valid character %c = %d", c, c);     getch(); }

Output: Enter a valid character: f ASCII value of valid character f = 102

C Program to Print Quotient and Remainder

#include <stdio.h> #include <conio.h>  void main()  {     int a, b, quotient, remainder;     printf("Enter dividend number: ");     scanf("%d", &a);     printf("Enter divisor number: ");     scanf("%d", &b);     quotient = a / b;     remainder = a % b;     printf("Quotient is= %d\n", quotient);     printf("Remainder is= %d", remainder);     getch(); }

Output: Enter dividend number: 22 Enter divisor number: 4 Quotient is = 5 Remainder is = 2

C Program to print size of variables

#include<stdio.h> #include <conio.h>  void main() {     int integer;     float float;     double double;     char character;    printf("Size of integer: %zu bytes\n", sizeof(integer));   printf("Size of float: %zu bytes\n", sizeof(float));   printf("Size of double: %zu bytes\n", sizeof(double));   printf("Size of character: %zu byte\n", sizeof(character));      getch(); }

Output: Size of integer: 4 bytes Size of float: 4 bytes Size of double: 8 bytes Size of character: 1 byte

C Program to print swap number using third variables

#include<stdio.h> #include <conio.h>  void main() {   int a, b, temp;   printf("Enter first number: ");   scanf("%d", &a);   printf("Enter second number: ");   scanf("%d", &b);    temp = a;     a = b;    b = temp;   printf("\nAfter swapping first number = %d\n", a);     printf("After swapping second number = %d", b);   getch(); }

Output: Enter first number: 8 Enter second number: 10 After swapping first number = 10 After swapping second number = 8

C Program to print swap number without using third variables

#include<stdio.h> #include <conio.h>  void main() {   int a, b;   printf("Enter first number: ");   scanf("%d", &a);   printf("Enter second number: ");   scanf("%d", &b);      a = a-b;     b = a+b;     b = b-a;   printf("\nAfter swapping first   number = %d\n", a);   printf("After swapping second number = %d", b);   getch(); }

Output:

Enter first number: 8 Enter second number: 10 After swapping first number = 10 After swapping second number = 8

C Program to print "Hello World!"

#include<stdio.h> #include<conio.h>  void main() {    float radius, area;    printf("\nEnter the radius of Circle : ");    scanf("%d", &radius);    area = 3.14 * radius * radius;    printf("\nArea of Circle : %f", area);    getch(); } }

Output: Enter the radius of Circle : 4.0 Area of Circle : 50.24

C Program to print system date in your machine.

#include <stdio.h> #include <conio.h> #include <dos.h> int main() {    struct date d;    getdate(&d);    printf("Current system date: %d/%d/%d", d.date_day, d.date_mon, d.date_year);    getch();    return 0; }

C Program to print Internet Protocol (IP) address in your machine.

#include<stdio.h> #include<stdlib.h> int main() {    system("C:\\Windows\\System32\\ipconfig");        return 0; }

C Program to shut down or turn off your machine or computer

#include <stdio.h> #include <stdlib.h>   int main() {    system("C:\\WINDOWS\\System32\\shutdown /s");      return 0; }

Introduction to C Language