01. Write a program to generate and print a table of the first 10 factorials.

    Answer

#include <stdio.h>

int main()

{

int y,fact;

fact=1;

printf("The first 10 factorials\n");

for (y=0;y<10;y++){

fact=fact*(y+1);

printf("%i\n",fact);}

return 0;

}

2. The factorial of an integer n, written n!, is the product of the consecutive integers 1 through n. For example, 

5 factorial is calculated as 

        5! = 5 x 4 x 3 x 2 x 1 = 120

Answer

#include <stdio.h>

int main()

{

int n,fact;

fact=1;

printf("Enter the number:");

scanf("%i",&n);

printf("\n");

for (n;n!=0;n=n-1)

fact=fact*n;

printf("%i",fact);

return 0;

}


3. Print the following shapes using loop construct of C programming

* 

* * 

* * * 

* * * * 

* * * * * 

* * * * * *

Answer

#include <stdio.h>

int main()

{

int x,y;

for (x=1;x<=6;x++)

{

for (y=1;y<=x;y++){

printf("*");

}  

printf("\n");

}

return 0;

}


1 

1 2 

1 2 3 

1 2 3 4 

1 2 3 4 5 

Answer

#include <stdio.h>

int main()

{

int x,y;

for (x=1;x<=5;x++)

{

for (y=1;y<=x;y++){

printf("%i",y);

}  

printf("\n");

}

return 0;

}


* * * * * * * 

* * * * * * *

* * * * * * * 

* * * * * * * 

* * * * * * *  

Answer

#include <stdio.h>

int main()

{

int x,y;

for (x=1;x<=5;x++)

{

for (y=1;y<=7;y++){

printf("*");

}  

printf("\n");

}

return 0;

}



* * * * * * 

* * * * * 

* * * * 

* * * 

* * 

*

Answer

#include <stdio.h>

int main()

{

int x,y;

for (x=6;x>=1;x--)

{

for (y=1;y<=x;y++){

printf("*");

}  

printf("\n");

}

return 0;

}


* * * * * * 

   * * * * * 

      * * * *

         * * * 

            * * 

               *

Answer

#include <stdio.h>


int main() {

    int rows, i, j;

rows=6;

    for (i = 1; i <= rows; i++) { 

        for (j = 1; j < i; j++) {

            printf("  ");

        }


        for (j = i; j <= rows; j++) {

            printf("* ");

        }

 

        printf("\n");

    }


    return 0;

}


4. A triangular number can also be generated by the formula 

    triangularNumber = n (n + 1) / 2  

for any integer value of n. For example, the 10th triangular number, 55, can be generated by substituting 10 as the value for n in the preceding formula. Write a program that generates a table of triangular numbers using the preceding formula.

Answer

#include <stdio.h>

int main()

{

int triangular_number,n,x;

triangular_number;

printf("Enter the number:");

scanf("%i",&n);

printf("\n");

printf("The first %i triangular numbers",n);

printf("\n");

for(x=1;x!=(n+1);x++){

triangular_number=x*(x+1)/2;

printf(" %3i\n",triangular_number);

}

return 0;




5, Assume a village has 20 houses. Input electricity unit charges and calculate total electricity bill according to the following criteria: 
 For first 50 units Rs. 0.50/unit 
 For next 100 units Rs. 0.75/unit 
 For next 100 units Rs. 1.20/unit 
 For unit above 250 Rs. 1.50/unit 
An additional surcharge of 20% is added to the bill

Answer

#include <stdio.h>

int main() {
    int no_of_Houses = 20;
    int unitsPerHouse, i;
    float totalBill = 0.0;

    printf("Enter the number of units consumed by each house:\n");

    for (i = 0; i < no_of_Houses; i++) {
        printf("House %d: ", i + 1);
        scanf("%d", &unitsPerHouse);

        if (unitsPerHouse <= 50) {
            totalBill += unitsPerHouse * 0.5;
        } else if (unitsPerHouse <= 150) {
            totalBill += (50 * 0.5) + (unitsPerHouse - 50) * 0.75;
        } else if (unitsPerHouse <= 250) {
            totalBill += (50 * 0.5) + (100 * 0.75) + (unitsPerHouse - 150) * 1.20;
        } else {
            totalBill += (50 * 0.5) + (100 * 0.75) + (100 * 1.20) + (unitsPerHouse - 250) * 1.50;
        }
    }

    totalBill += totalBill * (20.0 / 100.0); 

    printf("Total electricity bill for the village:  %.2f\n", totalBill);

    return 0;
}




6. Find the total and average of a sequence of 10 numbers

Answer

#include <stdio.h>
int main()
{
int number,total;
float average;
int i;
total=0;
for (i=1;i<=10;i++)
{
scanf("%d",&number);
printf("\n");
total=total+number;
}
printf("total %d\n average %f",total,average=(float)total/10);

return 0;
}


7. Find the minimum and maximum of sequence of 10 numbers.

Answer

#include <stdio.h>

int main() {

    int numbers[10];

    int minimum, maximum;

int i;

    printf("Enter 10 numbers:\n");

    for (i = 0; i < 10; i++) {

        scanf("%d", &numbers[i]);

    }

    minimum = maximum = numbers[0]; 

    for (i = 1; i < 10; i++) {

        if (numbers[i] < minimum) {

            minimum = numbers[i];

        }

        if (numbers[i] > maximum) {

            maximum = numbers[i];

        }

    }

    printf("Minimum number : %d\nMaximum number : %d\n", minimum, maximum);

  return 0;

}


8. Write a program to generate and display a table of n and n *n , for integer values of n ranging from 1 to 10. Be certain to print appropriate column headings.

Answer

#include <stdio.h>

int main() {

    int i;

printf("n\t\tn*n\n");

for(i=1;i<=10;i++)

printf("%d\t\t%d\n",i,i*i);

printf("\n");

    return 0;

}


9. Display the n terms of harmonic series and their sum. 

1 + 1/2 + 1/3 + 1/4 + 1/5 ... 1/n terms 

Test Data : Input the number of terms : 5 

Expected Output : 1/1 + 1/2 + 1/3 + 1/4 + 1/5 + 

Sum of Series upto 5 terms : 2.283334


Answer

#include <stdio.h>

int main() {

    int i,n;

    float sum = 0;

    printf("Input the number of terms: ");

    scanf("%d", &n);

    printf("1/1");

    for (i = 2; i <= n; i++) {

        printf(" + 1/%d", i);

        sum += 1.0 / i;

    }

    printf("\n");

    printf("Sum of Series upto %d terms: %f\n", n, sum + 1);

    return 0;

}