# cnum()

## Purpose

cnum(expr)

Converts expr to a number (integer).

Note

If the expression does not contain a numerical value, the following rule applies: the best match as the number is returned. For example “1x234” will return the number 1 and “Test123” will return 0. Zero is always returned if the there is no number at the start of the string. This also is the case for empty strings.

## Example

    cnum(3+2);

produces

    5

See also

Help with configuring/using `Rsyslog`:

- Mailing list - best route for general questions

- GitHub: rsyslog source project - detailed questions, reporting issues that are believed to be bugs with `Rsyslog`

See also

Contributing to `Rsyslog`:

- Source project: rsyslog project README.

- Documentation: rsyslog-doc project README

Copyright 2008-2023 Rainer Gerhards (Großrinderfeld), and Others.