====== DATETOTALDAYS ======

{{:en:mervis-ide:35-help:datetotaldays.png}}

===== Function name =====

DATETOTALDAYS

===== ST call =====

<code st-iec>
PROGRAM DATETOTALDAYS_DEMO
 VAR
     D1: DATE;
       LR1:LREAL;
  END_VAR
 LR1 := DATETOTALDAYS(IN1 := D1);
END_PROGRAM
</code>

===== Description =====

Returns number of days since the beginning of our era (since 1.1. 0000) for a particular date.\\


===== Inputs =====

|Input|Type    |Description|
|IN1  |ANY_DATE|Input value|

===== Outputs =====

|Output|Type |Description |
|=>    |LREAL|Output value|

===== Application example =====

{{:en:mervis-ide:35-help:datetotaldays_example.png}}\\
\\
This function is used where the number of days between two dates has to be calculated.\\