Armstrong numbers upto a given number

#include<stdio.h>
#include<math.h>
void main()
{
int num,sum,lim,dig,temp;
clrscr();
printf("Enter the limit :");
scanf("%d",&lim);
printf("\nArmstrong num upto %d are :\n",lim);
for(num=1;num<=lim;++num)
   {
   for(temp=num,sum=0;temp>0;temp/=10)

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Largest and smallest among n numbers

#include<stdio.h>
void main()
{
int n,i=1,num,big,small;
clrscr();
printf("Among how many numbers : ");
scanf("%d",&n);
if(n<0)
  printf("invalid input");
else
  {
  printf("Enter number %d :",i);
  scanf("%d",&num);
  big=small=num;
  for(;i<n;++i)
     {
     printf("Enter number %d :",i+1);
     scanf("%d",&num);
     if(big<num)
       big=num;
     if(small>num)
       small=num;
     }

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To display the 1st n prime numbers

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

void main()
{
int i,num,lim,flag,count=0;
clrscr();
printf("Enter the no.of prime numbers:");
scanf("%d",&lim);
printf("1st %d prime numbers are :\n",lim);
for(num=2;count<lim;++num)
   {
   flag=1;
   for(i=2;i<=sqrt(num);++i)

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Display whole numbers upto a given number

#include<stdio.h>

void main()

{

int i,num=0,n;

clrscr();

printf("Enter the limit : upto ");

scanf("%d",&n);

for(i=0;i<n;i++)

 {

 num+=1;

 printf("%d\t",num);

 }

getch();

}

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Display whole numbers between two given numbers

#include<stdio.h>

void main()

{

int i,j,num,k,initial;

clrscr();

printf("Enter the limit :  ");

scanf("%d%d",&j,&k);

if(j>k)

{

num=j-k;

initial=k;

}

else

{

num=k-j;

initial=j;

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Whole numbers from 100 to 2

#include<stdio.h>

void main()

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Display odd numbers upto a given number and display their sum and average

#include<stdio.h>

void main()

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Fibonacci series

#include<stdio.h>

void main()

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Even numbers upto a given number

#include<stdio.h>

void main()

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Program to print even numbers from 2 to 100

#include<stdio.h>

void main()

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