Java if-else-if ladder

Java if-else-if ladder is used to work on multiple conditions.Use if to specify a block of code to be executed, if a specified condition is true. Use else to specify a block of code to be executed, if the same condition is false. Use else if to specify a new condition to test, if the first condition is false.The else if condition is checked only if all the conditions before it (in previous else if constructs, and the parent if constructs) have been tested to false.

 
    public class else_if {
    public static void main(String args[]) {
        float avg;
        System.out.println("Enter The Average Mark : ");
        Scanner in = new Scanner(System.in);
        avg = in.nextFloat();
        if (avg >= 90 && avg <= 100) {
            System.out.println("Grade A");
        } else if (avg >= 80 && avg <= 89) {
            System.out.println("Grade B");
        } else if (avg >= 70 && avg <= 79) {
            System.out.println("Grade C");
        } else {
            System.out.println("Grade D");
        }
    }
}