# HackerRank Ruby Array - Addition problem solution

In this HackerRank Ruby Array - Addition problem solution Arrays provide a variety of methods that allow to add elements to them.

push allows one to add an element to the end of the list.

>x = [1,2]

>x.push(3)

=> [1,2,3]

insert allows one to add one or more elements starting from a given index (shifting elements after the given index in the process).

>x = [1,2]

>x.insert(1, 5, 6, 7)

=> [1, 5, 6, 7, 2]

unshift allows one or more elements to be added at the beginning of the list.

>x = [1,2,3]

>x.unshift(10, 20, 30)

=> [10, 20, 30, 1, 2, 3]

In this challenge, your task is to complete three functions that take in the array arr and

1. Add an element to the end of the list
2. Add an element to the beginning of the list
3. Add an element after a given index (position)
4. Add more than one element after a given index (position)

## Problem solution.

# Add `element` to the end of the Array variable `arr` and return `arr`
arr.push(element)
end

# Add `element` to the beginning of the Array variable `arr` and return `arr`
arr.unshift(element)
end

# Add `element` at position `index` to the Array variable `arr` and return `arr`
arr.insert(index, element)
end

# add any two elements to the arr at the index
arr.insert(index, 4, 2)
end

## Second solution.

# Add `element` to the end of the Array variable `arr` and return `arr`
arr.push( element )
end

# Add `element` to the beginning of the Array variable `arr` and return `arr`
arr.unshift( element )
end