Java Program to Find the Sum of all the Elements in an Array

In this tutorial, we will write a java program to calculate the sum of all the elements present in an array. Although it is quite simple, you still need to have an idea of the proper function of following in java:

• for loop in Java
• Array in java

The for loop in the program runs starting from 0 (array index starts from 0) to the total length of an array (i.e. till the last index). An inbuilt function is used to find the length of an array (array.length).

• Java Program to Sum all the Elements in an Array (user inputs)

Java Program to Find the Sum of all the Elements in an Array

  //find the sum of an array in java

 public class SumOfAnArray
 {  
    public static void main(String[] args) 
    {  
      int sum = 0; 
      //Initializing array  
      int [] arr = new int [] {5, 4, 6, 1, 9};  
        
      //sum of array 
      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:

Sum of all the elements of an array: 25