Inside Coldfusion MX

<cfparam name = "param_name" type = "data_type" default = "value">

Description

Use this tag to test whether a parameter exists, to test its data type, and to assign a default value.

Attributes

name (Required)

Name of the parameter to test.

type (Optional)

Uses: any, array, binary, Boolean, date, numeric, query, string, struct, UUID, and variableName.

default (Optional)

Value to set parameter to if it does not exist.