Java Practicals

            class CGPA {
                public static void main(String[] args) throws java.io.IOException {
                    java.io.BufferedReader input = new java.io.BufferedReader(new java.io.InputStreamReader(System.in));
            
                    try {
                        System.out.print("Enter the total number of subjects: ");
                        int totalSubjects = Integer.parseInt(input.readLine());
            
                        if (totalSubjects <= 0) {
                            System.out.println("Please enter a valid number of subjects.");
                        } else {
                            double totalCredits = 0;
                            double totalGradePoints = 0;
            
                            for (int i = 1; i <= totalSubjects; i++) {
                                System.out.print("Enter the credits for subject " + i + ": ");
                                double credits = Double.parseDouble(input.readLine());
                                System.out.print("Enter the grade points for subject " + i + ": ");
                                double gradePoints = Double.parseDouble(input.readLine());
            
                                totalCredits += credits;
                                totalGradePoints += (credits * gradePoints);
                            }
            
                            double cgpa = totalGradePoints / totalCredits;
                            double percentage = cgpa * 9.5;
            
                            System.out.println("CGPA: " + cgpa);
                            System.out.println("Percentage: " + percentage + "%");
                        }
                    } catch (NumberFormatException e) {
                        System.out.println("Invalid input. Please enter valid numeric values.");
                    } catch (Exception e) {
                        System.out.println("Something went wrong.");
                    }
                }
            }