Q: How to get the prime numbers between a given range?
Ans:
package javaTutorial;
import java.util.ArrayList;
import java.util.Scanner;
public class GetPrimeNumbers{
public static void main(String[] args){
Scanner in = new Scanner(System.in);
System.out.println("Enter a number from which you want prime number: ");
int p1 = in.nextInt();
System.out.println("Enter one more number till which you want prime number: ");
int p2 = in.nextInt();
ArrayList<Integer> prime = new ArrayList<Integer>();
int i=2;
for(int p=p1; p<=p2; p++){
i=2;
for(; i<10; i++){
if(p%i==0 && p!=i){
break;
}
}
if(i==10){
prime.add(p);
}
}
System.out.println("Prime numbers between "+p1+" and "+p2+" are: ");
for(int j=0; j<prime.size(); j++){
System.out.print(prime.get(j).toString()+", ");
}
}
}
Output:
Enter a number from which you want prime number:
10
Enter one more number till which you want prime number:
30
Prime numbers between 10 and 30 are:
11, 13, 17, 19, 23, 29,
Ans:
package javaTutorial;
import java.util.ArrayList;
import java.util.Scanner;
public class GetPrimeNumbers{
public static void main(String[] args){
Scanner in = new Scanner(System.in);
System.out.println("Enter a number from which you want prime number: ");
int p1 = in.nextInt();
System.out.println("Enter one more number till which you want prime number: ");
int p2 = in.nextInt();
ArrayList<Integer> prime = new ArrayList<Integer>();
int i=2;
for(int p=p1; p<=p2; p++){
i=2;
for(; i<10; i++){
if(p%i==0 && p!=i){
break;
}
}
if(i==10){
prime.add(p);
}
}
System.out.println("Prime numbers between "+p1+" and "+p2+" are: ");
for(int j=0; j<prime.size(); j++){
System.out.print(prime.get(j).toString()+", ");
}
}
}
Output:
Enter a number from which you want prime number:
10
Enter one more number till which you want prime number:
30
Prime numbers between 10 and 30 are:
11, 13, 17, 19, 23, 29,
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