Rounding a float to an integer in this program

Question

Hello, I would like to be able to use floats in this program. If i input say 50.5 at the moment i get an error (the program compiles ok).
What I want to happen is that i enter say 50.5, the program rounds this to 51 and then uses 51 thus not getting an error.
Thanks anyone
*Write a program to prompt the user to enter a mark as a
*floating point number.  Check that the mark is in the
*range 0.0 to 100.0 and, if not, repeat the prompt until
*the mark is in the required range.  Then display the
*indicative degree classification according to the mapping
*above, bearing in mind that marks with fractional parts
*greater than .5 are rounded up (e.g. 59.5 is to be interpreted
*as 60 and so as an Upper Second).
*Test your program to ensure that the mapping is correct.
import java.util.Scanner;
class FloatMark
     public static void main(String[] argStrings) throws Exception
          float mark;
          int intMark;
          do
               Scanner scan = new Scanner(System.in);
               System.out.println("Give me the float mark please: ");
               mark = scan.nextInt();
               intMark = Math.round(mark);
               if(intMark < 0 || intMark > 100)
                    System.out.println("Give me a valid float mark please");
               else if (intMark < 40)
                    System.out.println("Fail!");
               else if (intMark >= 40 && intMark < 49)
                    System.out.println("Third");
               else if (intMark >= 50 && intMark < 59)
                    System.out.println("Lower second");
               else if (intMark >= 60 && intMark < 69)
                    System.out.println("Higher second");
               else if (intMark >= 70)
                    System.out.println("First");
          while(intMark < 40 || intMark > 0);
}

Answer 1

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import java.util.Scanner;
class FloatMark
     public static void main(String[] argStrings) throws Exception
          float mark;
          int intMark;
          String exit = null;
          do
               Scanner scan = new Scanner(System.in);
               System.out.println("Give me the float mark please: ");
               mark = scan.nextFloat();
               exit = scan.nextLine();
               intMark = Math.round(mark);
               if(intMark < 0 || intMark > 100)
                    System.out.println("Give me a valid float mark please");
               else if (intMark < 40)
                    System.out.println("Fail!");
               else if (intMark >= 40 && intMark < 49)
                    System.out.println("Third");
               else if (intMark >= 50 && intMark < 59)
                    System.out.println("Lower second");
               else if (intMark >= 60 && intMark < 69)
                    System.out.println("Higher second");
               else if (intMark >= 70)
                    System.out.println("First");
          while(intMark < 100 || intMark > 0 || exit != "e");
}