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How to Calculate the Average using Arrays in Golang?
  • Last Updated : 10 May, 2020

Given an array of n elements, your task is to find out the average of the array.

Approach:

  • Accept the size of the array.
  • Accept the elements of the array.
  • Store the sum of the elements using for loop.
  • Calculate Average = (sum/size of array)
  • Print the average.

Example:

Input:

n = 4
array = 1, 2, 3, 4

Output :

sum = 10
average = 2.5




// Golang program to Calculate the Average using Arrays
package main
  
import "fmt"
  
func main() {
  
    // declaring an array of values
    arra := []int{1, 2, 3, 4}
      
    // size of the array
    n := 4 
      
    // declaring a variable
    // to store the sum  
    sum := 0 
  
    // traversing through the
    // array using for loop
    for i := 0; i < n; i++ {
  
        // adding the values of 
        // array to the variable sum
        sum += (arra[i])
    }
      
    // declaring a variable
    // avg to find the average
    avg := (float64(sum)) / (float64(n))
      
    // typecast all values to float 
    // to get the correct result
    fmt.Println("Sum = ", sum, "\nAverage = ", avg)
}

Output

Sum =  10 
Average =  2.5

Here, n is the size of the array and sum is to store the sum of all the values of the array. Using a for loop we find the sum of the elements of the array. After calculating the sum, we must convert the data types of the sum and size of the array to float, so that we don’t lose any decimal values.

To know more approaches you can go through the article Program for the average of an array (Iterative and Recursive)

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