scam

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1. Write C Program to generate multiplication table[Hint: use for/while loop].


#include <stdio.h>

int main() {
    int num, i, j;
    
    printf("Enter a number: ");
    scanf("%d", &num);
    
    for(i = 1; i <= 10; i++) {
        printf("%d x %d = %d\n", num, i, num*i);
    }
    
    return 0;
}

2. Write a c program to print sum of ‘n’ natural numbers.[Hint: use for loop].

#include <stdio.h>
int main() {
    int n, sum = 0;
    printf("Enter a number: ");
    scanf("%d", &n);
    for(int i = 1; i <= n; i++) {
        sum += i;
    }
    printf("The sum of the first %d natural numbers is %d\n", n, sum);
    return 0;
}

3. C Program to find factorial of a given number[Hint: n!=n(n-1), 4!=4*3*2*1=24].

#include <stdio.h>
int main() {
    int n, sum = 0;
    printf("Enter a number: ");
    scanf("%d", &n);
    for(int i = 1; i <= n; i++) {
        sum += i;
    }
    printf("The sum of the first %d natural numbers is %d\n", n, sum);
    return 0;
}

4. C Program to display Fibonacci sequence[Hint: Fibonacci sequence= 0,1,1,2,3,5,8.. ] [in Fibonacci series the first two numbers are 0 and 1, next number is the sum of previous two numbers for example 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55 etc. ].


#include <stdio.h>
int main() {
    int n, factorial = 1;
    printf("Enter a number: ");
    scanf("%d", &n);
    for(int i = 1; i <= n; i++) {
        factorial *= i;
    }
    printf("The factorial of %d is %d\n", n, factorial);
    return 0;
}

5. C Program to print a reverse of a given number.


#include <stdio.h>
int main() {
    int n, reverse = 0, remainder;
    printf("Enter a number: ");
    scanf("%d", &n);
    while(n != 0) {
        remainder = n % 10;
        reverse = reverse * 10 + remainder;
        n /= 10;
    }
    printf("The reverse of the number is %d\n", reverse);
    return 0;
}

6. C Program to check whether a number is palindrome or not[Hint: palindrome number is a number that is same after reverse. For example 121].


#include <stdio.h>
int main() {
    int n, reverse = 0, remainder, original;
    printf("Enter a number: ");
    scanf("%d", &n);
    original = n; // store the original value of n
    while(n != 0) {
        remainder = n % 10;
        reverse = reverse * 10 + remainder;
        n /= 10;
    }
    if(original == reverse) {
        printf("The number %d is a palindrome.\n", original);
    }
    else {
        printf("The number %d is not a palindrome.\n", original);
    }
    return 0;
}


7. C Program to check whether a number is prime or not.


#include <stdio.h>
int main() {
    int n, i, flag = 0;
    printf("Enter a positive integer: ");
    scanf("%d", &n);
    if (n == 0 || n == 1) {
        printf("%d is not a prime number.\n", n);
        return 0;
    }
    for (i = 2; i <= n/2; i++) {
        if (n % i == 0) {
            flag = 1;
            break;
        }
    }
    if (flag == 0)
        printf("%d is a prime number.\n", n);
    else
        printf("%d is not a prime number.\n", n);
    return 0;
}

8. C Program to count number of digits in an integer.


#include <stdio.h>
int main() {
    int num, count = 0;
    printf("Enter an integer: ");
    scanf("%d", &num);
    while (num != 0) {
        num /= 10;
        count++;
    }
    printf("The number of digits in the integer is: %d\n", count);
    return 0;
}

9. Write a program in C to read 10 numbers from the keyboard and find their sum and average.


#include <stdio.h>
int main() {
    int numbers[10];  // array to store 10 numbers
    int sum = 0;
    float average;
    for (int i = 0; i < 10; i++) {
        printf("Enter number %d: ", i+1);
        scanf("%d", &numbers[i]);
        sum += numbers[i];
    }
    average = (float)sum / 10;
    printf("Sum = %d\n", sum);
    printf("Average = %.2f\n", average);
    return 0;
}

10.  C Program to check armstrong number[Hint: Armstrong number is a number that is equal to the sum of cubes of its digits. For example 153=1^3+5^3+3^3].


#include <stdio.h>
int main()
{
    int num, originalNum, remainder, result = 0;
    printf("Enter an integer: ");
    scanf("%d", &num);
    originalNum = num;
    while (originalNum != 0)
    {
        remainder = originalNum % 10;
        result += remainder * remainder * remainder;
        originalNum /= 10;
    }
    if (result == num)
        printf("%d is an Armstrong number.", num);
    else
        printf("%d is not an Armstrong number.", num);
    return 0;
}

11. C Program to display factors of a number.

#include <stdio.h>
int main() {
   int num, i;
   printf("Enter a positive integer: ");
   scanf("%d", &num);
   printf("Factors of %d are: ", num);
   for(i=1; i<=num; i++) {
       if(num % i == 0)
           printf("%d ",i);
   }
   return 0;
}


12. C Program to make a simple calculator using switch case.

#include <stdio.h>
int main() {
    char operator;
    double num1, num2, result;
    printf("Enter an operator (+, -, *, /): ");
    scanf("%c", &operator);
    printf("Enter two numbers: ");
    scanf("%lf %lf", &num1, &num2);
    switch (operator) {
        case '+':
            result = num1 + num2;
            printf("%.2lf + %.2lf = %.2lf", num1, num2, result);
            break;
        case '-':
            result = num1 - num2;
            printf("%.2lf - %.2lf = %.2lf", num1, num2, result);
            break;
        case '*':
            result = num1 * num2;
            printf("%.2lf * %.2lf = %.2lf", num1, num2, result);
            break;
        case '/':
            if (num2 == 0) {
                printf("Error: Division by zero.");
            } else {
                result = num1 / num2;
                printf("%.2lf / %.2lf = %.2lf", num1, num2, result);
            }
            break;
        default:
            printf("Error: Invalid operator.");
    }
    return 0;
}

13. Write a C program to display the n terms of odd natural numbers and calculate their sum.


#include <stdio.h>
int main() {
    int n, i, sum = 0;
    printf("Enter the value of n: ");
    scanf("%d", &n);
    printf("The first %d odd natural numbers are: ", n);
    for (i = 1; i <= n; i++) {
        int num = 2*i - 1;  // odd number formula
        printf("%d ", num);
        sum += num;
    }
    printf("\nThe sum of the first %d odd natural numbers is: %d", n, sum);
    return 0;
}





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