Template:!!=
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{{{2}}}
Purpose
This template represents an "or-equals" operator (||=). It sets the given variable to the given value only if the variable doesn't already have a value. It returns the variable's new value, which is the same as its old value if it already had one.
Usage
{{!!=| name | value }}
- name — The name of the variable (without #var syntax).
- value — The value to which to initialize the variable if it's empty.