quantity field input validation

is it possible to write a tdl for the quantity field to accept either whole or half of the unit
like(1,1.5,2,2.5) and not values like (1.2,1.3,1.6,1.9)

 

Possible

 

use validate attribute in Field Level

 

Thanks a lot sir

 

is it also possible to display the quantity 0.5 as "1/2" while printing it

 

[Function : multiof]
Parameter: Inp : Number
Returns: Number
Variable: n:Number
1:While :Inp >0.0
2:Set :Inp:Inp-0.5
3:End While
4:If:Inp=0.0
5:Set:n:2
6:Else
7:Set:n:1
8:End If
9:Return :n
[#Line: CI InvInfo]


Local:Field:VCHBilledQty :Validate: ($$multiof:$$Value)=2



Sir can u Pls find out the error

 

Sir I found out the error. Now I need Help regarding the Printing alone