C Program to Check Whether a given Number is  Prime or Not

    In this example, we will check whether a given number is Prime or Not. To solve this problem we should know about Prime Numbers.

What is a Prime Number?

    Prime Numbers are those numbers which can only be divisible by 1 and the number itself.

        For Example: 2,3,5,7,etc are prime numbers, as these numbes are only divisible by 1 and the number itself. 

PROGRAM:

#include<stdio.h>

#include<conio.h>

int main()

{

    int x,i,count=0;

    printf("\nEnter the number : ");

    scanf("%d",&x);

    for(i=1;i<=x;i++)

    {

        if(x%i==0)

            count++;

    }

    if(count==2)

    {

        printf("\n%d is a Prime Number",x);

    }

    else

    {

        printf("\n%d is Not a Prime Number",x);

    }

}

OUTPUT:

 Enter the number : 5

 5 is a Prime Number

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