`1. Write a C program to print all even numbers between 1 and 100 using a for loop.

2. Write a C program to calculate the sum of all odd numbers between 1 and 50 using a while loop.

3. Write a C program to print the multiplication table of a given number using a for loop.

4. Write a C program to find the factorial of a given number using a for loop.

5. Write a C program to check if a given number is prime or not using a for loop.

6. Write a C program to print the Fibonacci series up to a given number using a for loop.

7. Write a C program to find the sum of all elements in an array using a for loop.

8. Write a C program to find the largest element in an array using a for loop.

9. Write a C program to find the smallest element in an array using a for loop.

10. Write a C program to reverse an array using a for loop.

11. Write a C program to sort an array in ascending order using a for loop.

12. Write a C program to sort an array in descending order using a for loop.

13. Write a C program to find the sum of the digits of a given number using a while loop.

14. Write a C program to check if a given number is a palindrome or not using a while loop.

15. Write a C program to convert a decimal number to binary using a while loop.

16. Write a C program to convert a binary number to decimal using a while loop.

17. Write a C program to find the GCD of two numbers using a while loop.

18. Write a C program to find the LCM of two numbers using a while loop.

19. Write a C program to print all Armstrong numbers between 1 and 1000 using a for loop.

20. Write a C program to print all perfect numbers between 1 and 1000 using a for loop.`

#include <stdio.h>

int main() {
   int num;
   
   do {
      printf("Enter a number between 1 and 10: ");
      scanf("%d", &num);
   } while(num < 1 || num > 10);
   
   printf("You entered: %d", num);
   
   return 0;
}

#include<stdio.h>
int main() {
    int year;
    printf("Enter a year that you want to check:");
    scanf("%d",&year);
    if((year%4==0 &&year%100!=0) ||( year%400==0))
        printf("%d is a leap year",year);
    else
        printf("%d is not a leap year",year);
    return 0;
}

#include<stdio.h>

int main()
{
    int rem,num,i=1,j;
    char Hexa[50];
     
    printf("Enter Decimal no: ");
    scanf("%d", &num);
    
    if(num!=0){
    while(num!=0){
    rem = num % 16;
    
    if(rem<10)
    rem=rem+48;
    
    else
    rem=rem+55;
    
    Hexa[i++]=rem;
    num=num/16;
    }}
    else{
    printf("0");
    }
    printf("\nHexadecimal Number is ");
    for(j=i;0<j;j--){
    printf("%c",Hexa[j]);
    }
    return 0;
} // @C_Codes_pro

#include <stdio.h>
#include <string.h>

int main() {
    char str[] = "Hello";
    int length = strlen(str);
    printf("Length of the string is: %d\n", length);
    return 0;
}

#include <stdio.h>
#include <string.h>

int main() {
    char source[] = "Hello";
    char destination[20];
    strcpy(destination, source);
    printf("Copied string is: %s\n", destination);
    return 0;
}

#include <stdio.h>
#include <string.h>

int main() {
    char str1[] = "Hello";
    char str2[] = "Hello";
    if (strcmp(str1, str2) == 0) {
        printf("Strings are equal\n");
    } else {
        printf("Strings are not equal\n");
    }
    return 0;
}

#include <stdio.h>
#include <string.h>

int main() {
    char str1[20] = "Hello";
    char str2[] = " World!";
    strcat(str1, str2);
    printf("Concatenated string is: %s\n", str1);
    return 0;
}

#include<stdio.h>
#define MAX 10
void transpose(int arr[][MAX], int transpose[][MAX], int row, int column) {
    for(int a = 0; a < column; a++) {
        for(int b = 0; b < row; b++) {
            transpose[a][b] = arr[b][a];
        }
    }
}
void Multiplication(int arr1[][MAX], int arr2[][MAX], int result[][MAX], int row1, int column1, int row2, int column2) {
    if(column1 != row2) {
        printf("Multiplication is not possible.");
        return;
    }    
    for(int a = 0; a < row1; a++) {
        for(int b = 0; b < column2; b++) {
            int sum = 0;
            for(int k = 0; k < column1; k++) {
                sum += arr1[a][k] * arr2[k][b];
            }
            result[a][b] = sum;
        }
    }
}
void printMatrix(int arr[][MAX], int row, int column) {
    for(int a = 0; a < row; a++) {
        for(int b = 0; b < column; b++) {
            printf("%d ", arr[a][b]);
        }
        printf("\n");
    }
}
int main() {
    int r1, c1, r2, c2;
    int ar1[MAX][MAX], ar2[MAX][MAX], result[MAX][MAX], transpose1[MAX][MAX], transpose2[MAX][MAX], transpose3[MAX][MAX];

    printf("Enter rows and columns of the first matrix (max 10): ");
    scanf("%d %d", &r1, &c1);

    printf("Enter rows and columns of the second matrix (max 10): ");
    scanf("%d %d", &r2, &c2);
   if(c1 != r2) {
        printf("Error!! Wrong row and column");
        return 0;
    }
   else{
    printf("Enter elements of the first matrix (A):\n");
    for(int a = 0; a < r1; a++) {
        for(int b = 0; b < c1; b++) {
            scanf("%d", &ar1[a][b]);
        }
    }
    printf("Enter elements of the second matrix (B):\n");
    for(int a = 0; a < r2; a++) {
        for(int b = 0; b < c2; b++) {
            scanf("%d", &ar2[a][b]);
        }
    }
    printf("\nLHS:\nMultiplication of Matrix (AB):\n");
    Multiplication(ar1, ar2, result, r1, c1, r2, c2);
    printMatrix(result, r1, c2);

    printf("Transpose of Matrix (AB)':\n");
    transpose(result, transpose3, r1, c2);
    printMatrix(transpose3, c2, r1);

    printf("\nRHS:\nTranspose of Matrix (A)'\n");
    transpose(ar1, transpose1, r1, c1);
    printMatrix(transpose1, c1, r1);

    printf("Transpose of Matrix (B)'\n");
    transpose(ar2, transpose2, r2, c2);
    printMatrix(transpose2, c2, r2);

    printf("Multiplication of Matrices (B'A'):\n");
    Multiplication(transpose2, transpose1, result, c2, r2, c1, r1);
    printMatrix(result, c2, r1);
  }

    return 0;
}

"Start"

int a = 6;
Pt"This is short c for this bot\nYou can practice in @io_coding group using short codes\n\nFor printf(); you can simply write pt and then your code \n\nRun code using /cc and you can easily convert this code in real c code by using /rcc command \nvar=%d", a

"End"

#include <stdio.h>
int main() {
    for (int i = 2; i <= 100; i += 2) {
        printf("%d ", i);
    }
    return 0;
}

#include <stdio.h>

int main() {
    int sum = 0;
    int num = 1;
    while (num <= 50) {
        if (num % 2 != 0) {
            sum += num;
        }
        num++;
    }
    printf("Sum of odd numbers: %d", sum);
    return 0;
}

#include <stdio.h>

int main() {
    int number;
    printf("Enter Number: ");
    scanf("%d", &number);

    for (int i = 1; i <= 10; i++) {
        printf("%d x %d = %d\n", number, i, number * i);
    }
    return 0;
}

#include <stdio.h>

int main() {
    int number;
    printf("Enter Number: ");
    scanf("%d", &number);

    int factorial = 1;
    for (int i = 1; i <= number; i++) {
        factorial *= i;
    }
    printf("Factorial of %d = %d", number, factorial);
    return 0;
}

#include <stdio.h>

int main() {
    int number;
    printf("Enter Number: ");
    scanf("%d", &number);

    int isPrime = 1; // Assume it's prime initially

    for (int i = 2; i <= number / 2; i++) {
        if (number % i == 0) {
            isPrime = 0; // It's not prime
            break;
        }
    }

    if (isPrime == 1 && number > 1) {
        printf("%d is a prime number.", number);
    } else {
        printf("%d is not a prime number.", number);
    }

    return 0;
}