Q:

# Kotlin program to find sum and average of array elements

belongs to collection: Kotlin Array Programs

Given a double type array, we have to find sum and average of its all elements.

Example:

```    Input:
arr = [4.0, 56.0, 7.0, 8.0, 43.0, 2.0, 3.0]

Output:
sum = 123.0
average = 17.571428571428573```

### Program to find sum and average of array elements in Kotlin

``````package com.includehelp

import java.util.*

//Main Function entry Point of Program
fun main(args: Array<String>) {
//Input Stream
val s = Scanner(System.`in`)

//Input Array Size
print("Enter number of elements in the array: ")
val size = s.nextInt()

//Create Double array of Given size
val doubleArray = DoubleArray(size)

//Input array elements
println("Enter Arrays Elements:")
for (i in doubleArray.indices) {
print("doubleArray[\$i] : ")
doubleArray[i] = s.nextDouble()
}

//declare variable for sum of elements
var sum: Double=0.toDouble()

for (i in doubleArray.indices) {
sum+=doubleArray[i]
}

//Avg of elements
var avg=sum/doubleArray.size

//Alternatively we can also use sum() and average() method of Arrays Class in
//var sum = doubleArray.sum()
//var avg = doubleArray.average()

println("Array : \${doubleArray.contentToString()} ")
println("Sum of Elements : \$sum")
println("Average of Elements : \$avg")
}
``````

Output

```Run 1:
-----
Enter number of elements in the array: 7
Enter Arrays Elements:
doubleArray[0] : 4
doubleArray[1] : 56
doubleArray[2] : 7
doubleArray[3] : 8
doubleArray[4] : 43
doubleArray[5] : 2
doubleArray[6] : 3
Array : [4.0, 56.0, 7.0, 8.0, 43.0, 2.0, 3.0]
Sum of Elements : 123.0
Average of Elements : 17.571428571428573
--------
Run 2:
----
Enter number of elements in the array: 6
Enter Arrays Elements:
doubleArray[0] : 45.32
doubleArray[1] : 5.7
doubleArray[2] : 9.21
doubleArray[3] : 9.6
doubleArray[4] : 34.98
doubleArray[5] : 6.54
Array : [45.32, 5.7, 9.21, 9.6, 34.98, 6.54]
Sum of Elements : 111.35000000000001
Average of Elements : 18.558333333333334```