Prime Number in C

 A simple program asks the user to give a number and then the program will check if the given number is a prime number or not using a c programming language.

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Program Listing

#include <stdio.h>

int main()
{
    int a=0,i=0,flag=0;
    
    printf("\n\n");
    printf("\tGive a number: ");
    scanf("%d",&a);
    
	printf("\n");
    flag=0;
    for(i=2;i <= a/2;i++)
    {
        if(a%i == 0)
        {
            flag=1;
            break;
         }
    }
    if(flag==0)
        printf("\tThe given number %d is a Prime Number.",a);
    else
          printf("\tThe given number %d is Not a Prime Number.",a);
    printf("\n\n");
    printf("\tEnd of Program");
    printf("\n");
    return 0;
}