Variables
Define variables with one letter
sentence="This is a good sentence."
s="This is a good sentence." #Better
Multiple variable assignement
a=2017
b=50
c="Fish"
a,b,c=2017,50,"Fish" #Better
Puts variables
a="Anana"
puts "My name is #{a}"
$a="Anana"
puts "My name is #$a" #Better