- Write a C++ program to print all Prime numbers between 1 to 100.
- How to find all Prime numbers between 1 to N.

## C++ program to print all prime numbers between 1 to N

#include<iostream> using namespace std; int main(){ int N, i, j, isPrime, n; cout << "Enter the value of N\n"; cin >> N; // For every number between 2 to N, check // whether it is prime number or not for(i = 2; i <= N; i++){ isPrime = 0; // Check whether i is prime or not for(j = 2; j <= i/2; j++){ // Check If any number between 2 to i/2 divides I // completely If yes the i cannot be prime number if(i % j == 0){ isPrime = 1; break; } } if(isPrime==0 && N!= 1) cout << i << " "; } return 0; }Output

Enter the value of N 50 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47