_Added in 4.2_

*$crc64(text|&binvar|filename,[N])*

Returns the CRC-64 checksum of the specified item.

*Parameters*

table(ktable).
|*Parameter*|*Description*|
| text<notextile>|</notextile>&binvar<notextile>|</notextile>filename | Value to calculate CRC-64 checksum from. |
| N | 0 = plain text, 1 = &binvar, 2 = filename (content of the file), 2 is default. |