if formula

Hi Experts,

I have below requirement wherein I want to discount % only if its less than 100 else word 'foc' should be printed, I tried below

if {Command.DiscPrcnt}= 100 then 'FOC'

else {Command.DiscPrcnt}

it gives message string is required.

Can you advise how to get number and text results in same if statement.

Thansk

Deepak