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Java Program to print the sum of all the items of the array
Here is a sample Java program that demonstrates how to print the sum of all the elements of an array:
Another approach is using IntStream
The sum of all elements in the array is: 32
Both examples are useful for finding the sum of all elements in an array.
Both examples has O(n) time complexity.
Note that both examples above are for an array of integers, if you want to find the sum of an array of other data types, you may have to convert the data type to Integer or a similar data type that support mathematical operation.
class SumArray
{
public int findSum(int[] arr) {
int sum = 0;
for (int i = 0; i < arr.length; i++) {
sum += arr[i];
}
return sum;
}
}
public class Main {
public static void main(String[] args) {
SumArray sa=new SumArray();
int[] arr = {1, 5, 3, 8, 2, 9, 4};
int sum = sa.findSum(arr);
System.out.println("The sum of all elements in the array is: " + sum);
}
}
This program uses a for-loop to iterate through the array and add each element to a variable called sum. The sum is then returned as the result.
Another approach is using IntStream
public class Main {
public static void main(String[] args) {
int[] arr = {1, 5, 3, 8, 2, 9, 4};
int sum = Arrays.stream(arr).sum();
System.out.println("The sum of all elements in the array is: " + sum);
}
}
In both examples above, the output will be:The sum of all elements in the array is: 32
Both examples are useful for finding the sum of all elements in an array.
Both examples has O(n) time complexity.
Note that both examples above are for an array of integers, if you want to find the sum of an array of other data types, you may have to convert the data type to Integer or a similar data type that support mathematical operation.
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