# Program to find sum of elements of an array in java
import java.util.Scanner;  
public class ArraySum {  
    public static void main(String[] args) {  
        //Initialize array  
        int [] arr = {10,20,30,45,56}; // use Scanner class to take input from user here 
        int sum = 0;  
        //Loop through the array to calculate sum of elements  
        for (int i = 0; i < arr.length; i++) {  
           sum = sum + arr[i];  
        }  
        System.out.println("Sum of all the elements of an array: " + sum);  
    }  
}  

Output
Run the program to see the OUTPUT