A program that prints all the prime numbers from 1 to n ? Where n is taken as an input from the user .

Question

lets say , the user asks to print all the prime numbers from 1 to 10 . 10 will be an input from the user .

Answer 1

ok so here is the right one
import java.io.*;
import java.util.*;
public class Primes{
public static boolean is_prime(int x){
int y=1,numOfFactors=0;
for(y=1;y<=x;y++){
if(x%y==0){
numOfFactors+=1;
}
}
if(numOfFactors==2){
return true;
}
else{
return false;
}
}
public static void main (String [] args) throws IOException{
Scanner s=new Scanner(System.in);
System.out.println("Enter the range(1 to ??): ");
int x=1, l=s.nextInt();
for(x=1;x<=l;x++){
if(is_prime(x)){
System.out.println(x);
}
}
}
}

Answer 2

ok

Answer 3

#include<iostream>
using namespace std;
bool is_prime(int x){
int y=1,NOF=0;
for(y=1;y<=x;y++){
if(x%y==0){
NOF+=1;
}
}
if(NOF==2){
return true;
}
else{
return false;
}
}
int main(){
cout<<"Enter the range(1 to ??): ";
int n;
cin>>n;
for(int x=1;x<=n;x++){
if(is_prime(x)){
cout<<x<<endl;
}
}
}

Answer 4

Well if I see my code nicely then it is a little wrong too, wait 5 minutes

Answer 5

sir??
I am 13

Answer 6

Python:
def manual(n):
for i in range(1,n+1):
if i % 2 != 0:
print(i)

Answer 7

thanks muCh

Answer 8

agreed with prabhakar

Answer 9

umm prabhakar , can you write me a c++ code of this ??

Answer 10

thank you so much sir .