In this chapter we covered how to declare and use both environment and local variables. We talked about how math is performed and how to work with arrays.

We also covered using variables in scripts. Script 1 showed how to assign a variable and display its value. Script 2 showed how to deal with numeric variables and Script 3 showed how to compare strings. Script 4 showed logical operators and Script 5 showed how math can be performed. Script 6 showed how environment variables are used and Script 7 showed how to use arrays.