content: public class if_for {
      public static void main(String[] args) {
          study_if(11);
          study_switch("web");
          study_for(5);
      }
  
      public static void study_if(int a){
          if (a > 10){
              System.out.println("a > 10");
          } else if (a == 10) {
              System.out.println("a == 10");
          }else {
              System.out.println("a < 10");
          }
      }
  
      public static void study_switch(String ctf){
          switch (ctf){
              case "web":
                  System.out.println("Study web is fun");
                  break;
              case "pwn":
                  System.out.println("pwn is difficult");
                  break;
              case "misc":
                  System.out.println("misc");
                  break;
              default:
                  System.out.println("reverse or mobile");
          }
      }
  
      public static void study_for(int i){
          for (int j = 0; j < i; j++){
              if (j == 1) continue;
              if (j == i - 1) break;
              System.out.println("j: " + j);
          }
      }
  
      public static void study_while(int k){
          while (k > 0){
              k--;
              System.out.println("k: " + k);
              if (k == 3) break;
          }
  
          do {
              System.out.println("k");
              k--;
          }while (k > -2);
      }
  }
  