#!/bin/bash

# playing with variables in bash




# just set the name to a value?
# AHA -- one gotcha: CANNOT have spaces around the = sign!?

# uncomment these, and you'll see there are problems...
#myVar = "moooo"
#myVar= "mooooo"
#myVar ="mooo"

myVar="moooo"

# ...but use $ in front of it to obtain its value...

echo $myVar

# http://wiki.bash-hackers.org/commands/builtin/let
#

# "The let builtin command evaluates each supplied word 
#  from left to
#  right as an arithmetic expression and returns an exit code
#  according to the truth value of the rightmost expression.

#
#    0 (TRUE) when arg evaluated to not 0 (arithmetic "true")
#    1 (FALSE) when arg evaluated to 0 (arithmetic "false")"



myNum=3

# using let here allows the arithmetic addition of
# adding myNum's value to 1 take place

let myNum+=1
echo "should see 4: $myNum"