2.how to get average of given numbers, take input using scanner in java ( best way )?

Way 1 : get average of given numbers, take input using scanner in java: Creating an array to store the values.

To calculate the average of a set of numbers using input from the user with the help of the Scanner class, you can follow these steps:

1. Import the necessary classes from the java.util package, including Scanner.
2. Create a Scanner object to read input from the user.
3. Prompt the user to enter the numbers, providing instructions or guidelines as needed.
4. Read the input values using the Scanner object, storing them in variables or a collection (such as an array or a list).
5. Calculate the sum of the numbers.
6. Calculate the average by dividing the sum by the total number of values.
7. Display the average to the user.

import java.util.Scanner;

public class AverageCalculator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter the number of values: ");
        int count = scanner.nextInt();

        // Create an array to store the values
        int[] numbers = new int[count];

        System.out.println("Enter the values:");

        // Read the input values and store them in the array
        for (int i = 0; i < count; i++) {
            numbers[i] = scanner.nextInt();
        }

        // Calculate the sum of the numbers
        int sum = 0;
        for (int number : numbers) {
            sum += number;
        }

        // Calculate the average
        double average = (double) sum / count;

        // Display the average to the user
        System.out.println("The average is: " + average);

        // Close the scanner
        scanner.close();
    }
}

When you run this code, it will ask the user to enter the number of values they want to calculate the average for. Then, it will prompt the user to enter those values one by one. Finally, it will display the calculated average to the user.

Way 2 : get average of given numbers, take input using scanner in java: along with a while loop.

Another way to calculate the average of a set of numbers using input from the user is to utilize the Scanner class along with a while loop. This approach allows the user to keep entering numbers until they decide to stop. Here’s a Java code snippet that demonstrates this approach:

import java.util.Scanner;

public class AverageCalculator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.println("Enter the numbers (enter 'q' to calculate the average):");

        int sum = 0;
        int count = 0;
        String input = scanner.next();

        while (!input.equalsIgnoreCase("q")) {
            int number = Integer.parseInt(input);
            sum += number;
            count++;
            input = scanner.next();
        }

        if (count > 0) {
            double average = (double) sum / count;
            System.out.println("The average is: " + average);
        } else {
            System.out.println("No numbers entered. Cannot calculate the average.");
        }

        scanner.close();
    }
}

In this code, the program continuously prompts the user to enter numbers until they enter ‘q’ (case-insensitive). Inside the while loop, each entered number is added to the sum variable, and the count variable is incremented to keep track of the total number of values entered. Finally, the average is calculated and displayed to the user. If no numbers are entered, a message is displayed indicating that the average cannot be calculated.

This approach provides flexibility for the user to enter any number of values and calculate the average at their convenience.

Way 3 : get average of given numbers, take input using scanner in java: by using hasNextInt() method.

Another way to calculate the average of a set of numbers using input from the user is to utilize the Scanner class along with the concept of cumulative sum. Instead of storing each entered number, we can keep updating the sum as the user enters the values. Here’s a Java code snippet that demonstrates this approach:

import java.util.Scanner;

public class AverageCalculator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter the number of values: ");
        int count = scanner.nextInt();
        scanner.nextLine(); // Consume the newline character
        
        System.out.println("Enter the values (separated by spaces):");
        String input = scanner.nextLine();

        Scanner numScanner = new Scanner(input);
        int sum = 0;
        int numCount = 0;

        while (numScanner.hasNextInt() && numCount < count) {
            int number = numScanner.nextInt();
            sum += number;
            numCount++;
        }

        if (numCount > 0) {
            double average = (double) sum / numCount;
            System.out.println("The average is: " + average);
        } else {
            System.out.println("No numbers entered. Cannot calculate the average.");
        }

        numScanner.close();
        scanner.close();
    }
}

In this code, the user is first prompted to enter the number of values they want to calculate the average for. Then, they are asked to enter the values separated by spaces. The input string is scanned using a separate Scanner object (numScanner). Within the while loop, the hasNextInt() method is used to check if there are more integers to be read from the input. The loop continues until either all integers are read or the desired count is reached. The sum is updated accordingly.

After calculating the sum and count, the average is calculated and displayed to the user. If no numbers are entered, a message is displayed indicating that the average cannot be calculated.

This approach allows the user to enter a specific number of values and calculate the average based on those values.

You can run above all code here just copy and paste.

Other Related Assignments: