Crystal Reports conditional formatting

Message

     Is it possible to format a number on the following condition:

if {rawname} = 'Alfa' then {amount} without decimals
else with decimals

rawname    amount
alfa                      1
gamma           1.00
beta             12.76

sql database is passing numeric(15,2).

rawname is a string
amount is a number

i tried several formulas and nothing worked as expected. i'd like to handle that using (Format Field > Tab: Number > Customize.. > Decimals and click on the formula button)

i used a similar method to control the font, ie

if {rawname} = 'alfa' then crBold 
else crRed;

and this worked.

thanks so much in advanced.