Appending a string to XSL value after XSLT

Question

XSL file:

<xsl:attribute name="id">                          
    <xsl:value-of select="$text/FieldName"/>
</xsl:attribute>

XML data:

<FieldName>
   meLikeStackOverflow
</FieldName>

after XSLT...

<id>meLikeStackOverflow</id>

How can i edit the XSL files such that after XSLT, it will look like this:

<id>meListStackOverflow_LBL</id> 

Answer 1

<xsl:value-of select="concat($text/FieldName, '_LBL')"/>