//Program to print evun numbers from 0 to n using while loop.
//-------------------------------
#include<stdio.h>
int main()
{ int i=0,n;
printf("Enter the value of n:");
scanf("%d",&n);
while(i<=n)
{
printf("%d\n",i);
i=i+2;
}
return 0;
}

//#while_loop

//Program to print odd numbers from 1 to n using while loop.
//--------------------------
#include<stdio.h>
int main()
{ int i=1,n;
printf("Enter the value of n:");
scanf("%d",&n);
while(i<=n)
{
printf("%d\n",i);
i=i+2;
}
return 0;
}

//#while_loop

//Program to add numbers from 1 to n using while loop.
#include<stdio.h>
int main()
{ int i=1,n,sum=0;
printf("Enter the value of n:");
scanf("%d",&n);
while(i<=n)
{
sum=sum+i;
i++;
}
printf("The sum of %d numbers is :%d",n,sum);
return 0;
}

//#while_loop

//Program to print multiplication table using while loop.
#include<stdio.h>
int main()
{ int i=1,n;
printf("Enter the value of n:");
scanf("%d",&n);
while(i<=10)
{
printf("%d x %d = %d\n",n,i,n*i);
i++;
}
return 0;
}

//#while_loop

//Program to print multiplication table in reverse order using while loop.
#include<stdio.h>
int main()
{ int i=10,n;
printf("Enter the value of n:");
scanf("%d",&n);
while(i)
{
printf("%d x %d = %d\n",n,i,n*i);
i--;
}
return 0;
}

//#while_loop

//Program to find factorial of a number using while loop.
#include<stdio.h>
int main()
{ int i=1,fact=1,n;
printf("Enter the value of n:");
scanf("%d",&n);
while(i<=n)
{
fact=fact*i;
i++;
}
printf("The factorial of %d is : %d",n,fact);
return 0;
}

//#while_loop

//Program to generate fibonacci series using while loop.
#include<stdio.h>
int main()
{ int i=1,n,n1=0,n2=1,nextTerm;
printf("Enter the limit of fibonacci series:");
scanf("%d",&n);
while(i<=n)
{
printf("%d\n",n1);
nextTerm=n1+n2;
n1=n2;
n2=nextTerm;
i++;
}
return 0;
}

//#while_loop

// Program to check weather a number is prime or not using while loop.
#include <stdio.h>
int main()
{
int num, i = 2, isPrime = 1;
printf("Enter the number:");
scanf("%d", &num);
if (num <= 1)
{
isPrime = 0;
}
else
{
while (i <= num / 2)
{
if (num % i == 0)
{
isPrime = 0;
break;
}
i++;
}
}
if(isPrime==1)
{
printf("%d is a prime number.",num);
}
else{
printf("%d is not a prime number.",num);
}
return 0;
}

//#while_loop