Write a program to find out the first 25 numbers of a Fibonacci sequence. Following are the first few terms of the Fibonacci Sequence: 1 1 2 3 5 8 13 21 34 55 89…………………

Source Code :

#include<stdio.h>

void main()

{

      float a=1,b=1,c;

      int ctr=3;

Write a program to print all Armstrong numbers between 1 & 500. If the sum of cubes of each digit of the no. is equal to the no. itself, then the no. is called an Armstrong Number.

Source Code :

#include<stdio.h>

void main()

{

      int b,c=0,div,rem,i,j,n,ctr=0,temp[5];

      clrscr();

      printf("\nArmstrong Numbers between 1 to 500 : ");

      for(n=1;n<=500;n++)

      {

            div=n;

If a 5-digit number is input through the keyboard. Write a program to print a new number by adding one to each of its digits. E.g. If the no. that is 12391, then the output should be displayed as 23402.

Source Code :

#include<stdio.h>

void main()

{

      int m,i,j,n,r=0,c;

      clrscr();

      printf("Enter a 5-digit number : ");

      scanf("%d",&m);

If a 4-digit number is input though the keyboard. Write a program to obtain the sum of the first & last digit of this number.

Source Code :

#include<stdio.h>

void main()

{

      int a,sum=0,rem,div,ctr=1;

      clrscr();

      printf("\nEnter a 4-digit Number : ");

      scanf("%d",&a);

Write a C Program to generate Prime Number from 10 to 50

Source Code :

#include<stdio.h>

void main()

{

      int n=10,i,j,fl=0;            //Declaration of variables

      clrscr();

      printf("\nThe Prime Numbers between 10 to 50 :")

      for(i=n;i<=50;i++)      //For Loop Iteration from 10 to 50 times

      {

Write a Program to find out the Greatest Common Divisor (GCD) of Two Numbers

Source Code :

#include<stdio.h>

void main()

{

      int a,b,i,s,cf=0;

      clrscr();

      printf("\nEnter Two Numbers : ");

      scanf("%d%d",&a,&b);

      if(a<b)

            s=a;        //Assigning smallest number

      else

            s=b;

Write a C Program to check whether a number is Prime or not

Source Code :

#include<stdio.h>

void main()

{

      int n,i,fl=0;     //Declaration of variables

      clrscr();

      printf("\nEnter a Number : ");

      scanf("%d",&n);   //Initialization of number from user

      for(i=2;i<n;i++)    //For Loop for checking prime number

      {

            if(n%i==0)  //Checking if the number can be divided

            {                        //by any other number other

                  fl=1;

            }

      }