Program to check weather the given number is odd or even.

/*Program to check weather the given number is prime or not*/

#include

int main()

{

int i,n,c;

       c=0;

       printf("Enter number:");

       scanf("%d",&n);

        for(i=1;i<=n;i++)

       {

if (n%i==0)

{

c++;

}

        }

        if (c==2)

       {

printf("%d is a prime                             number",n);

         }

        else

        printf("%d is not a prime                    number",n);

return 0;

}

OUTPUT:

NOTE:

Prime numbers are those numbers which have 1and itself as a factor.

Example-a)

5 only 1 and 5 are the factors of 5.So it is a prime number.

b) 6-1,2,3,6 are the factors of 6.So it is not a prime number.

DESCRIPTION:

Simply,in this program we ask the user to input a number then we divide that number with every others numbers which are less than that and is counted.If the count value is 2, it is prime number.

TRY IT YOURSELF:

Write a program to find the square and cube of a given number.