Validation

Hi ,

I have one scenario that where 

if the value is not 0 and the values should not round off and it should accept up to 9 decimals like 3.612232423.

Minimum Rate: 3.5

Maximum Rate: 4

input value is of number(dec) format i mean CDT has this data type, how can we achieve this if user enters any values apart from the scenario mentioned above should not except.

Thanks in advance.