diff --git a/unit2_ex2.3.1.py b/unit2_ex2.3.1.py
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+# In the program about the legend "The Ugly Duckling" we defined the following variables:
+fairy_tale = "The Ugly Duckling"
+swan_height = 90.7
+eggs_num = 4
+# What will be the output when you run the following lines of code?
+
+# 1:
+int(swan_height)
+# Enswer: 90
+
+# 2:
+# int(fairy_tale)
+# Enswer: error message
+
+# 3:
+surprise = bool(eggs_num)
+str(surprise)
+# Enswer: 'True'
+