ColdFusion already supports string concatenation using "&" operator.

ColdFusion 8 introduces a new string operator "&=" for compound concatenation.

<cfset sFirstName = "Indy">

<cfset sLastName = "Nagpal">

<cfset spacer = " ">



<cfoutput>

   variables.sFirstName = #sFirstName#<br/>

   variables.sLastName = #sLastName#<br/>

   variables.spacer = " "

</cfoutput>



<!--- & Concatenates strings --->

<cfset variables.sFullName = variables.sFirstName & spacer & variables.sLastName>



<p><strong>Concatanation using &</strong></p>

<p><cfoutput>#variables.sFullName#</cfoutput></p>



<!--- &= Compound concatenation. The variable on the right is used as both an element in the concatenation operation and the result variable. Thus, the expression a &= b is equivalent to a = a & b.

An expression can have only one compound assignment operator.

 --->

<cfset variables.sFullName = variables.sFirstName>

<cfset variables.sFullName &= spacer>

<cfset variables.sFullName &= variables.sLastName>



<p><strong>Concatanation using &=</strong></p>

<cfoutput>#variables.sFullName#</cfoutput>

This code yields the following output. =======Start output======= variables.sFirstName = Indy
variables.sLastName = Nagpal
variables.spacer = " "

Concatanation using &

Indy Nagpal

Concatanation using &=

Indy Nagpal =======End output======= More information on string operators in ColdFusion 8 is at Adobe ColdFusion 8 Livedocs