if, else, elseif
Synopsis
<#if condition>
...
<#elseif condition2>
...
<#elseif condition3>
...
...
<#else>
...
</#if>
Where:
-
condition,
condition2,
...etc.: Expression evaluates to a boolean value.
Description
You can use if, elseif
and else directives to conditionally skip a
section of the template. The
condition-s must
evaluate to a boolean value, or else an error will abort template
processing. The elseif-s and
else-s must occur inside if
(that is, between the if start-tag and end-tag).
The if can contain any number of
elseif-s (including 0) and at the end optionally
one else. Examples:
if with 0 elseif and no
else:
 |  |  |
 |
<#if x == 1>
x is 1
</#if> |
|  |
 |  |  |
if with 0 elseif and
else:
 |  |  |
 |
<#if x == 1>
x is 1
<#else>
x is not 1
</#if> |
|  |
 |  |  |
if with 2 elseif and no
else:
 |  |  |
 |
<#if x == 1>
x is 1
<#elseif x == 2>
x is 2
<#elseif x == 3>
x is 3
</#if> |
|  |
 |  |  |
if with 3 elseif and
else:
 |  |  |
 |
<#if x == 1>
x is 1
<#elseif x == 2>
x is 2
<#elseif x == 3>
x is 3
<#elseif x == 4>
x is 4
<#else>
x is not 1 nor 2 nor 3 nor 4
</#if> |
|  |
 |  |  |
To see more about boolean expressions, see: Template Author's Guide/The Template/Expressions.
You can nest if directives (of
course):
 |  |  |
 |
<#if x == 1>
x is 1
<#if y == 1>
and y is 1 too
<#else>
but y is not
</#if>
<#else>
x is not 1
<#if y < 0>
and y is less than 0
</#if>
</#if> |
|  |
 |  |  |
Note
How to test if x is greater than 1? <#if x >
1> will be , as FreeMarker
will interpret the first > as the end of the
tag. Thus, either write <#if (x > 1)>
or <#if x > 1>.