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diff --git a/module/ice-9/debugging/example-fns.scm b/module/ice-9/debugging/example-fns.scm
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+(define-module (ice-9 debugging example-fns)
+ #:export (fact1 fact2 facti))
+
+(define (fact1 n)
+ (if (= n 0)
+ 1
+ (* n (fact1 (- n 1)))))
+
+(define (facti n a)
+ (if (= n 0)
+ a
+ (facti (- n 1) (* a n))))
+
+(define (fact2 n)
+ (facti n 1))
+
+; Test: (fact2 3)