The following code is used check out whether the given number is prime number or not .
void main()
{
int a,i,j=0;
printf("Enter the given number");
scanf("%d",&n);
if(i>2)//handling test case for number<2
{
for(i=2, i less than n ,i++) { if(n%i==0) { j=1; break; } } if(j==0) printf("Given number is prime"); else printf("Given number is not prime number"); }