How to sum values with Freemarker

[Roberto]

Hello, I've a problem with this freemarker script:

<#if risultato?is_hash>
<#if risultato.row?exists>
                <#if risultato.row?is_sequence>
<#assign tmp = 0>
                        <#list risultato.row as x>
                             <#assign tmp = tmp+x.rank>
                        </#list>
                <#else>
                <#assign tmp = risultato.row.rank>
                </#if>
</#if>
<#else>
<#assign tmp="no match">
</#if>
${tmp}

I would like to sum values contained into the variable risultato.row.rank and store it into the variable tmp

The problem is that this instruction <#assign tmp = tmp+x.rank> treats the numbers as string... so the output is a concatenated string like: 102.98129128.129387123 where the two numbers are:

102.98129 and 128.129387123

Which is the right sintax?

[Roberto]

Solved:

The right sintax is:

                             <#assign tmp=tmp?number+x.rank?number>