Syntax question, please

[Tiglath]

I have this: 

---
- name: Run this play locally - Create CentOS 6.7 VM
  hosts: localhost
  connection: local
  vars:
    ipaddr: 192.168.33.10
  tasks: 
        ...
     
If I pass ipaddr=<addr>  in the ansible-playbook command line
then I want that address instead of the  hard-coded one. 

Something like this

vars: {{ ipaddr }}  | 192.168.33.10

Meaning take {{ ippaddr }} if specified else the hard-coded default.

What is the correct syntax to do that?   I've been looking in the wrong places, it seems.

Many thanks

[Chris Shultz]

{{ipaddr|default('192.168.33.10')}}

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[Tiglath]

Gratitude.