## Unique Number

A unique number parameter generates a unique value from the specified range. This is helpful in case where unique data is required e.g. execute a query for all customer ID, whose IDs number ranges from 100 to 999, create 900 Vusers and set the start number to 100 and block size to 100

### Parameter Details

- Parameter Name: Unique name of the parameter.
- Format: It is used to define the format of unique number to be generated. There are the following formats used which are listed below:
  - %01lu
  - %02lu
  - %03lu
  - %04lu
  - %05lu
  - %06lu
  - %07lu
  - %08lu
  - %09lu
- Update Value On: It is used to indicate on which the value is being updated. This property has two options:
  - Session:In this option value of the parameter is set once for each service request. It does not depend on how many times this parameter is used in response template.
  - Use:In this option value of the parameter is set every time it is used in the response template.