Java: Check if the sum of all the 10's in the array is exactly 30

Last update on May 09 2025 12:48:29 (UTC/GMT +8 hours)

31. Check if total of 10s equals 30

Write a Java program to check if the sum of all the 10's in the array is exactly 30. Return false if the condition does not satisfy, otherwise true.

Pictorial Presentation:

Sample Solution:

Java Code:

// Import the java.util package to use utility classes, including Arrays.
import java.util.*;

// Import the java.io package to use input and output classes.
import java.io.*;

// Define a class named Exercise31.
public class Exercise31 {
    // The main method for executing the program.
    public static void main(String[] args) {
        // Declare and initialize an array of integers.
        int[] array_nums = {10, 77, 10, 54, -11, 10};

        // Print the original array.
        System.out.println("Original Array: " + Arrays.toString(array_nums));

        // Define the search number and the fixed sum.
        int search_num = 10;
        int fixed_sum = 30;

        // Call the result method with the array, search number, and fixed sum as arguments and print the result.
        System.out.println("Result: " + result(array_nums, search_num, fixed_sum));
    }	

    // Define a method named result that takes an array of integers, a search number, and a fixed sum as inputs.
    public static boolean result(int[] numbers, int search_num, int fixed_sum) {
        // Initialize a temporary sum.
        int temp_sum = 0;

        // Use an enhanced for loop to iterate through the array elements.
        for (int number : numbers) {
            // Check if the current number is equal to the search number.
            if (number == search_num) {
                // Add the search number to the temporary sum.
                temp_sum += search_num;
            }

            // Check if the temporary sum exceeds the fixed sum.
            if (temp_sum > fixed_sum) {
                // If the sum exceeds the fixed sum, exit the loop.
                break;
            }
        }

        // Check if the temporary sum is equal to the fixed sum and return the result.
        return temp_sum == fixed_sum;
    }
}

Sample Output:

                                                                              
Original Array: [10, 77, 10, 54, -11, 10]                              
Result: true

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to check if the sum of all 5’s in an array is exactly 25.
• Write a Java program to check if the product of all prime numbers in an array is a perfect square.
• Write a Java program to check if an array contains a specified number exactly 'n' times.
• Write a Java program to determine if the sum of all odd numbers in an array is a prime number.

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