Menu

Tech

English

Sum

Lesson 12 of 24 in Coddy's Golang Challenges - Level 1 course.

Challenge

Easy

We have an array like this: [2, 4, 6, 7, 8, 8, 9].

Write a function that calculates the sum of the first, the middle, and the last elements of a given array.

If the array doesn't have a middle element that divides the slice into two equal parts, return -1.

For our example, we should calculate the sum of 2 + 7 + 9 = 18.

Explanation:

[2] - the first element
[7] - the middle element: [2, 4, 6] 7 [8, 8, 9]
[9] - the last element.

Try it yourself

func calculateSum( )   {
 
}

All lessons in Golang Challenges - Level 1

1Introduction

4Play with Characters

Introduction String Tokenizer Substring Extractor Character Occurrence Counter String Character Printer String Reversal & Duplication Word Counter String Compression Removes Duplicate

2Play With Numbers

Sum And Divide Generate Pattern Number Rotation Even and Divisible Numbers Diamond Pattern Abundant Number Check a Number

3Play with Slices & Arrays

Longest String Double Even Numbers Sum Average Minimum and MaxSumEven & Odd Numbers Slice to Map Non Repeated Indices