/* 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 ) */