C Program to Check whether a number is Prime or not.
#C Program
Source Code:
#include stdio.h
int main()
{
int n,i,a=0;
printf("Enter a number: ");
scanf("%d", &n);
for(i=2;i =n/2;i++)
{
if (n%i== 0)
{
a=1;
}
}
{
if (a==0)
printf("%d is a prime number.", n);
else
printf("%d is a composite number.", n);
}
}