Hello World
Escaping characters is done "Like this".
foo is foobar 
foo is $foo 
foobarfoobarbarbaz
This string was made with multiple parameters. 
This string was made with concatenation.
$a is indeed 4: 4
$a and $b are indeed 3: 3 3
Should be 5: 5
Should be 6: 6
Preincrement 
Should be 6: 6
Should be 6: 6
Postdecrement 
Should be 5: 5
Should be 4: 4
Predecrement 
Should be 4: 4
Should be 4: 4
Should be aa: aa