Added "if to check for existance" to readme.

Added documentation that explains how to use TMPL_IF and
TMPL_ELSEIF to check for a variable's existance.

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index c9f46ab..f23ad85 100644
--- a/README.md
+++ b/README.md
@@ -114,7 +114,7 @@ Prints the variable named "variable\_name" in it's place, if no variable named "
 
 Branching statements, checks if a variable is equal to a constant value.
 
-Checks if the variable "variable\_name" contains the string "check\_value". There is currently no way to check if two variables are equal. Elseif and Else clauses are optional. All `TMPL_IF` statements must be closed with `TMPL_END`.
+Checks if the variable "variable\_name" contains the string "check\_value". There is currently no way to check if two variables are equal. Elseif and Else clauses are optional. All `TMPL_IF` statements must be closed with `TMPL_END`. You can use `TMPL_IF` and `TMPL_ELSEIF` to check for a variable's existance by not specifying a `value` parameter.
 
 	<TMPL_LOOP name="loop_name">
 	: