text: #include <iostream>
  
  using namespace std;
  
  int main()
  {
      int day;
      cout<<"enter day no";
      cin>>day;
      switch (day)
      {
      case 1:
          cout<<"Mon"<<endl;
          break;
      case 2:
          cout<<"Tues"<<endl;
          break;
      case 3:
          cout<<"Wed"<<endl;
          break;
      case 4:
          cout<<"Thu"<<endl;
          break;
      case 5:
          cout<<"Fri"<<endl;
          break;
      case 6:
          cout<<"Sat"<<endl;
          break;
      case 7:
          cout<<"Sun"<<endl;
          break;
      
      default: cout<<"invalid day";
          break;
      }
  }