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-rw-r--r--booleans/booleans.scm6
1 files changed, 6 insertions, 0 deletions
diff --git a/booleans/booleans.scm b/booleans/booleans.scm
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+(define-module (booleans))
+
+(define-public (boolean-invert bool)
+ "Returns the opposite value of the
+passed in boolean."
+ (not bool))