How to Calculate average Array/slice numbers in Golang Code examples

In this blog post, You will learn two programs for finding the average of array/slice numbers.

• First program to find the average of a fixed array of numbers
• The second program to read the input of values from a user via the command line calculates the average.

Following are golang features are required to under this programs.

• Slice Guide
• For Loop Basics
• For Loop in range form

#How to Find the average of an array of numbers in Golang?

Following is a sequence of steps.

• First Array of integers is declared with the inline assignment of the values.
• Iterated array using for loop with a range form
• Find the length of the array using the len function
• Finally, Divide the total by length to get average

package main

import "fmt"

func main() {
    var numbs = [] int {
        51, 4, 5, 6, 24
    }
    total: = 0
    for _, number: = range numbs {
        total = total + number
    }
    average: = total / len(numbs) // len  function return array size
    fmt.Printf("Average of array %d", average)

}

The output of the above program

Average of array 18

#How to check the average of numbers entered by the user console in Golang

In this program, User gives the numbers input via command line using fmt.Scanln function.
Here is a program code to read numbers from the command line and return the average of it

package main

import "fmt"

func main() {
    var array[50] int
    var total, count int
    fmt.Print("How many numbers you want to enter: ")
    fmt.Scanln( & count)
    for i: = 0;
    i < count;
    i++{
        fmt.Print("Enter value : ")
        fmt.Scanln( & array[i])
        total += array[i]
    }

    average: = total / count
    fmt.Printf("Average is  %d", average)

}

The output of the above program is

How many numbers you want to enter: 5  
Enter value : 1  
Enter value : 2  
Enter value : 3  
Enter value : 4  
Enter value : 5  
Average is 3

#Conclusion

A Step by step tutorial and Program to Calculate average using an Array/slice of numbers read input from the command line and average of numbers example.