/* The basic types of variable are:
realnumber
complexnumber
rgbnumber
realimage
compleximage
rgbimage
realsubarea
complexsubarea
rgbsubarea
string

The 'number' is shorthand for 'realnumber', the 'image' is shorthand 
for 'realimage', and the 'subarea' is shorthand for 'realsubarea'.

Examples of single variable declaration:
number count1
complexnumber abc1

Examples of several variable declaration:
number count1, count2, count3
complexnumber abc1, abc2, abc3


A variable may also be initialized in its declaration by either = or :=. For instance,
number count1 = 50
number count2 = count1 + 300
complexnumber abc1 = complex( 2, 4 )
image background1 := IntegerImage("Background", 2, 1, 256, 256 )
*/