====== Get Pipeline Parameter Count ======
This command allows users to easily access how many values are contained within a previously defined pipeline parameter. 

===== Command Syntax =====
The command can be found in the Pipeline Workshop within the Pipeline Control folder as so:
<code>
Get_Pipeline_Parameter_Count
/PARAMETER_NAME=
! /PARAMETER_VALUE=
;
</code>

====Command Parameters====
The following table shows the command parameters that can be used to define the command and their descriptions:

^ **Parameter**  ^ **Description** ^
|**Parameter Name**|Name of the parameter generated, which contains the count.|
|**Parameter Value**|List whose items we want to count.|

===== Examples =====
==== Example: Create List Parameter and Count Values ====

Create a parameter with three values, then retrieve the count: 
<code>
Set_Pipeline_Parameter
/PARAMETER_NAME=TEST_PARAMETER
/PARAMETER_VALUE=ONE+TWO+THREE
! /PARAMETER_VALUE_SEARCH_FOR=
! /PARAMETER_VALUE_REPLACE_WITH=
! /PARAMETER_VALUE_PREFIX=
! /PARAMETER_VALUE_APPEND=
;
</code>

::TEST_PARAMETER = ONE+TWO+THREE

<code>
Get_Pipeline_Parameter_Count
/PARAMETER_NAME=COUNT
/PARAMETER_VALUE=ONE+TWO+THREE
;
</code>

::COUNT = 3

==== Example: Count Number of Signals in a Folder ====

More usefully, we might want to count the number of a particular item contained within a file. For example, we may want to know how many [[visual3d:documentation:c3d_signal_types:target_data_type|TARGET]] signals are included in a specific [[visual3d:documentation:c3d_signal_types:c3d_format|C3D file]].

<code>
Set_Pipeline_Parameter_To_List_Of_Signal_Names
/PARAMETER_NAME=TARGETS
/SIGNAL_TYPE=TARGET
SIGNAL_FOLDER=ORIGINAL
;
</code>

TARGETS = LAS+LPP+LPS+LTH1+LTH2+LTH3+LTH4+RAS+RPP+RPS+RTH1+RTH2+RTH3+RTH4

<code>
Get_Pipeline_Parameter_Count
/PARAMETER_NAME=COUNT
/PARAMETER_VALUE=::TARGETS
;
</code>

::COUNT = 14