The below program reads the total number of students and their scores and then display the grade of each student.

Program:

//Import required packages

import java.io.*;

import java.util.Scanner;

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//Class name

public class sample1 {

// Main Method

public static void main(String[] args) {

// Create a Scanner

Scanner input = new Scanner(System.in);

// Get the number of students

System.out.print("Enter the number of students: ");

int numberOfStudents = input.nextInt();

//Create an object for the static method

double[] scores = new double[numberOfStudents]; // Array scores

double best = 0; // The best score

// Read scores and find the best score

System.out.print("Enter " + numberOfStudents + " scores: ");

for (int i = 0; i < scores.length; i++) {

scores[i] = input.nextDouble();

if (scores[i] > best)

best = scores[i];

}

// Declare and initialize output string

char grade; // The grade

// Assign and display grades

for (int i = 0; i < scores.length; i++) {

if (scores[i] >= best - 10)

grade = 'A';

else if (scores[i] >= best - 20)

grade = 'B';

else if (scores[i] >= best - 30)

grade = 'C';

else if (scores[i] >= best - 40)

grade = 'D';

else

grade = 'F';

//Print the output

System.out.println("Student " + i + " score is " + scores[i]+ " and grade is " + grade);

}

}

}

Enter the number of students: 5

Enter 5 scores: 78 92 69 45 56

Student 0 score is 78.0 and grade is B

Student 1 score is 92.0 and grade is A

Student 2 score is 69.0 and grade is C

Student 3 score is 45.0 and grade is F

Student 4 score is 56.0 and grade is D