Check out example codes for "lua operators". It will help you in understanding the concepts better.

Code Example 1

== -- Equal to whatever
<= -- Less than or equal to
>= -- Greater than or equal to
< -- Less than
> -- Greater Than
~= -- Doesnt equal
# -- Length of something

Code Example 2

== equal to
~= not equal to
< less than
> greater than
<= less than or equal to
>= greater than or equal to

+	Addition
-	Subtraction
*	Multiplication
/	Division
^	Exponentiation
%	Modulus
-	Unary negation

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