Lazy Days

import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int temp;
    String activity = "";

    // input temperature
    System.out.println("Please enter the temperature:");
    temp = scan.nextInt();

    // suggest activity
    /*
     * temp >= 80: swimming
     60 <= temp < 80: tennis
     40 <= temp < 60: golf
     temp < 40: skiing
     */
    if (temp >= 90 || temp <= 20) {
      activity = "visit our shops";
    } else {
      if (temp >= 80) {
        activity = "Go swimming.";
      } else if (temp >= 60) {
        activity = "Play tennis.";
      } else if (temp >= 40) {
        activity = "Play golf.";
      } else {
        activity = "Go skiing.";
      }
    }

    //output results
    System.out.println(activity);
  }
}