using namespace std;
int prime(int n); //function for checking if the no. is prime or not
int prime(int n)
int i,flag=0; //i for loop(dividing the no. with 1 to sqrt of the no. and a variable called flag
for (i=1;i<=sqrt(n);i++) //a no. is prime if it is divisible by only 1 when divided by nos. upto the root of the no.
if (n%i==0) //if the no. is divisible by i
flag+=1; //increment flag
if (flag==1) //if flag=1 i.e theno. is divisible by only 1 when divided by nos. upto the root of the no.
return 1; //return 1;
int n=2,j,count=1; //n i.e the no. to be checked if it is prime or not(we start it by 2 as 1 is nota prime no.) and count keeps track of the no. of prime nos. detected
cout<<"The first hundred prime nos. are"<<endl;
j=prime(n); //checkif n is prime
if (j==1) //if it is prime, display n and increment count
else //else dont increment count
n++; //increment n(so that the next no. can be checked and so on
PhD researcher at Friedrich-Schiller University Jena, Germany. I'm a physicist specializing in theoretical, computational and experimental condensed matter physics. I like to develop Physics related apps and softwares from time to time. Can code in most of the popular languages. Like to share my knowledge in Physics and applications using this Blog and a YouTube channel.