How to find the sum of all the numbers in an array in java?

You can find the sum of all the elements of an array using loops. Create a count variable with initial value 0, iterate the loop till end of the array, add each element to the count.

Example

import java.util.Arrays;
import java.util.Scanner;

public class SumOfAllNumbers {
   public static void main(String args[]) {
      Scanner sc = new Scanner(System.in);
      int count = 0;
      System.out.println("Enter the size of the array that is to be created:: ");
      int size = sc.nextInt();
      int[] myArray = new int[size];
      System.out.println("Enter the elements of the array ::");

      for(int i=0; i<size; i++) {
         myArray[i] = sc.nextInt();
         count = count+myArray[i];
      }
      System.out.println("Array is :: "+Arrays.toString(myArray));
      System.out.println("Sum of all numbers in the array is :: "+count);
   }
}

Output

Enter the size of the array that is to be created::
5
Enter the elements of the array ::
45
56
85
78
99
Array is :: [45, 56, 85, 78, 99]
Sum of all numbers in the array is :: 363