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+<p>
+ If a variable is assigned but not used then Gleam will emit a warning.
+</p>
+<p>
+ If a variable is intended not to be use then the name can be prefixed with an
+ underscore, silencing the warning.
+</p>
+<p>
+ Try changing the variable name to <code>score</code> to see the warning.
+</p>