1. Hello World Program
#include <stdio.h>
#include<conio.h>
int main() {
printf("Hello, World!");
return 0;
getch();
}
Output
Hello, World!
2. Program to Add Two Numbers
#include <stdio.h>
#include<conio.h>
int main() {
int a, b, sum;
a = 10;
b = 20;
sum = a + b;
printf("Sum = %d", sum);
return 0;
getch();
}
Output
Sum = 30
3. Program to Find Even or Odd Number
#include <stdio.h>
#include<conio.h>
int main() {
int num = 7;
if (num % 2 == 0)
printf("Even number");
else
printf("Odd number");
return 0;
getch();
}
Output
Odd number
4. Program to Find Largest of Two Numbers
#include <stdio.h>
#include<conio.h>
int main() {
int a = 15, b = 25;
if (a > b)
printf("A is greater");
else
printf("B is greater");
return 0;
getch();
}
Output
B is greater
5. Program to Print Numbers from 1 to 5 (Using Loop)
#include <stdio.h>
#include<conio.h>
int main() {
int i;
for (i = 1; i <= 5; i++) {
printf("%d ", i);
}
return 0;
}
Output
1 2 3 4 5
6. Program to Find Factorial of a Number
#include <stdio.h>
#include<conio.h>
int main() {
int i, n = 5;
int fact = 1;
for (i = 1; i <= n; i++) {
fact = fact * i;
}
printf("Factorial = %d", fact);
return 0;
getch();
}
Output
Factorial = 120
7. Program to Check Vowel or Consonant
#include <stdio.h>
#include<conio.h>
int main() {
char ch = 'a';
if (ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')
printf("Vowel");
else
printf("Consonant");
return 0;
gecth();
}
Output
Vowel
8. Program to Take Input from User
#include <stdio.h>
#include<conio.h>
int main() {
int num;
printf("Enter a number: ");
scanf("%d", &num);
printf("You entered: %d", num);
return 0;
gecth();
}
Output
Enter a number: 5
You entered: 5
9. Program to Find Largest of Three Numbers
#include <stdio.h>
#include<conio.h>
int main() {
int a, b, c;
a = 10;
b = 25;
c = 15;
if (a > b && a > c)
printf("A is largest");
else if (b > c)
printf("B is largest");
else
printf("C is largest");
return 0;
gecth();
}
Output
B is largest
10. Program to Print Multiplication Table
#include <stdio.h>
#include<conio.h>
int main() {
int i, n = 5;
for (i = 1; i <= 10; i++) {
printf("%d x %d = %d\n", n, i, n * i);
}
return 0;
getch();
}
Output
5 x 1 = 5
5 x 2 = 10
...
5 x 10 = 50
11. Program to Reverse a Number
#include <stdio.h>
#include<conio.h>
int main() {
int num = 123, rev = 0;
while (num != 0) {
rev = rev * 10 + num % 10;
num = num / 10;
}
printf("Reversed number = %d", rev);
return 0;
gecth();
}
Output
Reversed number = 321
12. Program to Check Palindrome Number
#include <stdio.h>
#include<conio.h>
int main() {
int num = 121, temp, rev = 0;
temp = num;
while (num != 0) {
rev = rev * 10 + num % 10;
num = num / 10;
}
if (temp == rev)
printf("Palindrome number");
else
printf("Not a palindrome");
return 0;
getch();
}
Output
Palindrome number
13. Program to Find Sum of Digits
#include <stdio.h>
#include<conio.h>
int main() {
int num = 123, sum = 0;
while (num != 0) {
sum = sum + num % 10;
num = num / 10;
}
printf("Sum of digits = %d", sum);
return 0;
getch();
}
Output
Sum of digits = 6
14. Program Using Array (Print Elements)
#include <stdio.h>
#include<conio.h>
int main() {
int i;
int arr[5] = {10, 20, 30, 40, 50};
for (i = 0; i < 5; i++) {
printf("%d ", arr[i]);
}
return 0;
getch();
}
Output
10 20 30 40 50
15. Program to Find Sum of Array Elements
#include <stdio.h>
#include<conio.h>
int main() {
int i, sum = 0;
int arr[5] = {1, 2, 3, 4, 5};
for (i = 0; i < 5; i++) {
sum = sum + arr[i];
}
printf("Sum = %d", sum);
return 0;
getch():
}
Output
Sum = 15