// this is my code
import java.util.*;

public class conditional {
public static void main(String args[]){

    Scanner sc = new Scanner(System.in);

    int age = sc.nextInt();

    if(age>=18){
        System.out.println("you are eligible to vote,drive,drink");
    }

    if(age>=13 && age<18){
        System.out.println("you are teenager");
    }

    else{
        System.out.println("you are not an adult");
    }
}

}

this is the error i am getting

20
you are eligible to vote,drive,drink
you are not an adult

when i entered age 17 it was showing you are an teenager
when i entered age 12 it showed you are not an adult
when i entered age 18 or more tha 18 it is showing both you are eligible to vote,drive,drink
you are not an adult