Examples

• {{#invoke:string|sub|[[Help:Contents]]|3|-3}} → Help:Contents
• {{#invoke:string|length|Help:Contents}} → Script error: The function "length" does not exist.
• {{#invoke:string|find|Help:Contents|Contents}} → 6
• {{#invoke:string|find|Help:Contents|Contents|yes|no}} → 6
• {{#invoke:string|find|Help:Contents|ABC|yes|no}} → 0
• {{#invoke:string|replace|Help:Contents|Contents|Lua}} → Help:Lua
• {{#invoke:string|trim|--Help:Contents--|-}} → Script error: The function "trim" does not exist.