Question: I am new to ruby, I am trying to write a method that checks if the word includes "hello" case insensitive e.g "HelLO" would still be true.

Answer: 
I can think of two approaches:

1. [`downcase`](https://ruby-doc.org/core-3.1.2/String.html#downcase-method) before comparing

```rb
str = "HelLO"

str.downcase.include?('hello')
#=> true

```
2. use case-insensitive [regular rexpression](https://ruby-doc.org/core-3.1.2/Regexp.html)

```rb
str = "HelLO"

str.match?(/hello/i)
#=> true

```
I think the easiest approach is to downcase both string and do the comparing. Like this:

```rb
'HellO'.downcase.include?('hello')
# true

```