How did this ugly Code pass ? .. output is incorrect ...... How do I fix it for Winter ?

Here is the best to use switch statement :)

if(month==12){ System.out.println("winter"); }else if(month>=1 && month<=2){ System.out.println("winter"); }else if(month>=3 && month<=5){ System.out.println("spring"); }else if(month>=6 && month<=8){ System.out.println("summer"); }else if(month>=9 && month<=11){ System.out.println("autumn"); }

... thanks to stackoverflow for some cool java || or grammar choices https://stackoverflow.com/questions/29855905/and-and-or-statements-in-java ..... your compiler just took a beating trying all these variations

if(month>=3 && month<=5) {
            System.out.println("spring");
        }
        else if(month>=6 && month<=8) {
            System.out.println("summer");
        }
        else if(month >=9 && month <=11) {
            System.out.println("autumn");
        }
        else if(month == 12 || month == 1 || month == 2) {
            System.out.println("winter");
        }
        // else {
        //    System.out.println("winter");
        //}
    }
}

OK --- so this compiles correctly today !? ... after talking to it nicely ? But -- as Thomas C points out; my code is bogus ! lol I will be back when I figure out better grammar for a 12 or 1 or 2 statement.

You shouldn't do that as if the user enters a number like 13 or 14 it'll still display winter Think about how to set your last if else statement to only check for 12, 1 and 2