Code With SaiPradeep

#include <stdio.h>

int main() {
    char answer;

    do {
        printf("Do you want to continue? (y/n): ");
        scanf(" %c", &answer);

        if (answer == 'y') {
            printf("Continuing...n");
        } else if (answer == 'n') {
            printf("Exiting...n");
        } else {
            printf("Invalid input. Please enter 'y' or 'n'.n");
        }

    } while (answer != 'n');

    return 0;
}

Input: y
Output: Do you want to continue? (y/n): Continuing...
Input: z
Output: Do you want to continue? (y/n): Invalid input. Please enter 'y' or 'n'.
Input: Y
Output: Do you want to continue? (y/n): Invalid input. Please enter 'y' or 'n'.
Input: n
Output: Do you want to continue? (y/n): Exiting...

#include <stdio.h>

int main() {
  int number;
  int lower_bound = 10;
  int upper_bound = 20;

  do {
    printf("Enter a number between %d and %d: ", lower_bound, upper_bound);
    scanf("%d", &number);

    if (number < lower_bound || number > upper_bound) {
      printf("Invalid input. Please enter a number within the specified range.n");
    }
  } while (number < lower_bound || number > upper_bound);

  printf("You entered: %dn", number);

  return 0;
}

Input: 5
Output: Enter a number between 10 and 20: 5
Invalid input. Please enter a number within the specified range.
Input: 25
Output: Enter a number between 10 and 20: 25
Invalid input. Please enter a number within the specified range.
Input: 15
Output: Enter a number between 10 and 20: 15
You entered: 15

#include <stdio.h>

int main() {
  int number;

  do {
    printf("Enter a positive number: ");
    scanf("%d", &number);

    if (number <= 0) {
      printf("Invalid input. Please enter a positive number.n");
    }
  } while (number <= 0);

  printf("You entered: %dn", number);

  return 0;
}

Input: -5
Output: Enter a positive number: Invalid input. Please enter a positive number.
Input: 0
Output: Enter a positive number: Invalid input. Please enter a positive number.
Input: 10
Output: Enter a positive number: You entered: 10

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

int main() {
    int secretNumber, guess;
    int attempts = 0;

    srand(time(0));
    secretNumber = rand() % 100 + 1;

    do {
        printf("Guess a number between 1 and 100: ");
        scanf("%d", &guess);
        attempts++;

        if (guess > secretNumber) {
            printf("Too high!n");
        } else if (guess < secretNumber) {
            printf("Too low!n");
        } else {
            printf("Congratulations! You guessed the number in %d attempts.n", attempts);
        }
    } while (guess != secretNumber);

    return 0;
}

Guess a number between 1 and 100: Input: 50
Output: Too high!
Guess a number between 1 and 100: Input: 25
Output: Too low!
Guess a number between 1 and 100: Input: 37
Output: Too high!
Guess a number between 1 and 100: Input: 31
Output: Too low!
Guess a number between 1 and 100: Input: 34
Output: Too low!
Guess a number between 1 and 100: Input: 35
Output: Congratulations! You guessed the number in 6 attempts.

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

int main() {
    int choice;
    float num1, num2, result;

    do {
        printf("Menu:n");
        printf("1. Additionn");
        printf("2. Subtractionn");
        printf("3. Multiplicationn");
        printf("4. Divisionn");
        printf("0. Exitn");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        if (choice >= 1 && choice <= 4) {
            printf("Enter two numbers: ");
            scanf("%f %f", &num1, &num2);
        }

        switch (choice) {
            case 1:
                result = num1 + num2;
                printf("Result: %fn", result);
                break;
            case 2:
                result = num1 - num2;
                printf("Result: %fn", result);
                break;
            case 3:
                result = num1 * num2;
                printf("Result: %fn", result);
                break;
            case 4:
                if (num2 != 0) {
                    result = num1 / num2;
                    printf("Result: %fn", result);
                } else {
                    printf("Cannot divide by zero.n");
                }
                break;
            case 0:
                printf("Exiting...n");
                break;
            default:
                printf("Invalid choice.n");
        }
    } while (choice != 0);

    return 0;
}

Menu:
1. Addition
2. Subtraction
3. Multiplication
4. Division
0. Exit
Enter your choice: 1
Input: 1
Enter two numbers:
Input: 5.0 3.0
Output: Result: 8.000000
Menu:
1. Addition
2. Subtraction
3. Multiplication
4. Division
0. Exit
Enter your choice: 2
Input: 2
Enter two numbers:
Input: 10.0 4.0
Output: Result: 6.000000
Menu:
1. Addition
2. Subtraction
3. Multiplication
4. Division
0. Exit
Enter your choice: 3
Input: 3
Enter two numbers:
Input: 2.5 4.0
Output: Result: 10.000000
Menu:
1. Addition
2. Subtraction
3. Multiplication
4. Division
0. Exit
Enter your choice: 4
Input: 4
Enter two numbers:
Input: 10.0 2.0
Output: Result: 5.000000
Menu:
1. Addition
2. Subtraction
3. Multiplication
4. Division
0. Exit
Enter your choice: 4
Input: 4
Enter two numbers:
Input: 5.0 0.0
Output: Cannot divide by zero.
Menu:
1. Addition
2. Subtraction
3. Multiplication
4. Division
0. Exit
Enter your choice: 5
Input: 5
Output: Invalid choice.
Menu:
1. Addition
2. Subtraction
3. Multiplication
4. Division
0. Exit
Enter your choice: 0
Input: 0
Output: Exiting...

#include <stdio.h>

int main() {
    int base, exponent;
    long long result = 1;

    printf("Enter the base: ");
    scanf("%d", &base);

    printf("Enter the exponent: ");
    scanf("%d", &exponent);

    for (int i = 0; i < exponent; i++) {
        result *= base;
    }

    printf("Result = %lldn", result);

    return 0;
}

Input: 2
Input: 3
Output: Result = 8

Input: 5
Input: 0
Output: Result = 1

Input: 3
Input: 4
Output: Result = 81

Input: 2
Input: 10
Output: Result = 1024

#include <stdio.h>

int main() {
    int num1, num2, max;

    scanf("%d %d", &num1, &num2);

    max = (num1 > num2) ? num1 : num2;

    for (;;) {
        if (max % num1 == 0 && max % num2 == 0) {
            printf("%d", max);
            break;
        }
        max++;
    }

    return 0;
}

Input: 12 18
Output: 36
Input: 5 7
Output: 35
Input: 2 4
Output: 4
Input: 15 25
Output: 75
Input: 1 10
Output: 10

#include <stdio.h>

int main() {
    int rows, i, j, space;

    scanf("%d", &rows);

    for (i = 1; i <= rows; i++) {
        for (space = i; space < rows; space++) {
            printf(" ");
        }
        for (j = 1; j <= (2 * i - 1); j++) {
            printf("*");
        }
        printf("n");
    }

    for (i = rows - 1; i >= 1; i--) {
        for (space = i; space < rows; space++) {
            printf(" ");
        }
        for (j = 1; j <= (2 * i - 1); j++) {
            printf("*");
        }
        printf("n");
    }

    return 0;
}

Input: 5
Output:
    *
   ***
  *****
 *******
*********
 *******
  *****
   ***
    *

#include <stdio.h>

int main() {
  int rows, i, j, space;

  printf("Enter the number of rows: ");
  scanf("%d", &rows);

  for (i = 1; i <= rows; i++) {
    for (space = i; space < rows; space++) {
      printf(" ");
    }

    for (j = 1; j <= (2 * i - 1); j++) {
      printf("*");
    }
    printf("n");
  }

  return 0;
}

// Code not available

#include <stdio.h>

int main() {
  int rows, i, j;

  printf("Enter the number of rows: ");
  scanf("%d", &rows);

  for (i = rows; i >= 1; --i) {
    for (j = 1; j <= i; ++j) {
      printf("*");
    }
    printf("n");
  }

  return 0;
}

Input: 5
Output:
Enter the number of rows: *****
****
***
**
*

#include <stdio.h>

int main() {
  int rows;

  printf("Enter the number of rows: ");
  scanf("%d", &rows);

  for (int i = 1; i <= rows; i++) {
    for (int j = 1; j <= i; j++) {
      printf("*");
    }
    printf("n");
  }

  return 0;
}

Input: 5
Output: *
**
***
****
*****

#include <stdio.h>

int main() {
    int num, i;

    printf("Enter an integer: ");
    scanf("%d", &num);

    printf("Factors of %d are: ", num);

    for (i = 1; i <= num; ++i) {
        if (num % i == 0) {
            printf("%d ", i);
        }
    }

    printf("n");

    return 0;
}

Input: 12
Output: Factors of 12 are: 1 2 3 4 6 12

Input: 7
Output: Factors of 7 are: 1 7

Input: 25
Output: Factors of 25 are: 1 5 25

Input: 1
Output: Factors of 1 are: 1

#include <stdio.h>

int main() {
    int num, i, flag = 0;

    printf("Enter a positive integer: ");
    scanf("%d", &num);

    if (num <= 1) {
        printf("%d is not a prime number.n", num);
        return 0;
    }

    for (i = 2; i <= num / 2; ++i) {
        if (num % i == 0) {
            flag = 1;
            break;
        }
    }

    if (flag == 0)
        printf("%d is a prime number.n", num);
    else
        printf("%d is not a prime number.n", num);

    return 0;
}

Input: 7
Output: 7 is a prime number.

Input: 12
Output: 12 is not a prime number.

Input: 1
Output: 1 is not a prime number.

Input: 2
Output: 2 is a prime number.

Input: 0
Output: 0 is not a prime number.

Input: -5
Output: -5 is not a prime number.

#include <stdio.h>
#include <stdbool.h>

int main() {
    int start, end, i, j;
    bool isPrime;

    printf("Enter the starting number: ");
    scanf("%d", &start);

    printf("Enter the ending number: ");
    scanf("%d", &end);

    printf("Prime numbers between %d and %d are:n", start, end);

    for (i = start; i <= end; i++) {
        if (i <= 1)
            continue;

        isPrime = true;
        for (j = 2; j * j <= i; j++) {
            if (i % j == 0) {
                isPrime = false;
                break;
            }
        }

        if (isPrime) {
            printf("%d ", i);
        }
    }
    printf("n");
    return 0;
}

Input: 10
Input: 20
Output: Prime numbers between 10 and 20 are:
11 13 17 19
Input: 1
Input: 10
Output: Prime numbers between 1 and 10 are:
2 3 5 7
Input: 20
Input: 30
Output: Prime numbers between 20 and 30 are:
23 29
Input: 1
Input: 1
Output: Prime numbers between 1 and 1 are:

#include <stdio.h>

int main() {
  int n, i;
  int first = 0, second = 1;
  int next;

  printf("Enter the number of terms: ");
  scanf("%d", &n);

  printf("Fibonacci Series: ");

  for (i = 0; i < n; i++) {
    printf("%d ", first);
    next = first + second;
    first = second;
    second = next;
  }

  printf("n");
  return 0;
}

Input: 10
Output: Fibonacci Series: 0 1 1 2 3 5 8 13 21 34

#include <stdio.h>

int factorial(int n) {
    int fact = 1;
    for (int i = 1; i <= n; i++) {
        fact *= i;
    }
    return fact;
}

int isStrong(int num) {
    int sum = 0;
    int temp = num;
    while (temp != 0) {
        int digit = temp % 10;
        sum += factorial(digit);
        temp /= 10;
    }
    return (sum == num);
}

int main() {
    int start, end;

    printf("Enter the starting number: ");
    scanf("%d", &start);

    printf("Enter the ending number: ");
    scanf("%d", &end);

    printf("Strong numbers between %d and %d are: ", start, end);
    for (int i = start; i <= end; i++) {
        if (isStrong(i)) {
            printf("%d ", i);
        }
    }
    printf("n");

    return 0;
}

Input: 1
Input: 150
Output: Strong numbers between 1 and 150 are: 1 2 145

#include <stdio.h>

int main() {
    int start, end, i, j, sum;

    printf("Enter the starting number: ");
    scanf("%d", &start);

    printf("Enter the ending number: ");
    scanf("%d", &end);

    printf("Perfect numbers between %d and %d are: ", start, end);

    for (i = start; i <= end; i++) {
        sum = 0;
        for (j = 1; j < i; j++) {
            if (i % j == 0) {
                sum += j;
            }
        }

        if (sum == i) {
            printf("%d ", i);
        }
    }
    printf("n");

    return 0;
}

Input: 1
Input: 10
Output: Perfect numbers between 1 and 10 are: 6
Input: 20
Input: 30
Output: Perfect numbers between 20 and 30 are: 28
Input: 1
Input: 500
Output: Perfect numbers between 1 and 500 are: 6 28 496
Input: 490
Input: 500
Output: Perfect numbers between 490 and 500 are: 496

#include <stdio.h>
#include <math.h>

int main() {
    int start, end, i, num, originalNum, remainder, n = 0;
    float result = 0.0;

    printf("Enter the start of the range: ");
    scanf("%d", &start);
    printf("Enter the end of the range: ");
    scanf("%d", &end);

    printf("Armstrong numbers between %d and %d are: ", start, end);

    for (i = start; i <= end; ++i) {
        originalNum = i;
        num = i;
        n = 0;
        result = 0.0;

        while (originalNum != 0) {
            originalNum /= 10;
            ++n;
        }

        originalNum = num;

        while (originalNum != 0) {
            remainder = originalNum % 10;
            result += pow(remainder, n);
            originalNum /= 10;
        }

        if ((int)result == num) {
            printf("%d ", num);
        }
    }

    printf("n");

    return 0;
}

Input: 100
Input: 500
Output: Armstrong numbers between 100 and 500 are: 153 370 371 407
Input: 1
Input: 10
Output: Armstrong numbers between 1 and 10 are: 1 2 3 4 5 6 7 8 9
Input: 0
Input: 0
Output: Armstrong numbers between 0 and 0 are: 0