diff --git a/Chapter_05/5-10_checking_usernames.py b/Chapter_05/5-10_checking_usernames.py
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+# Exercise 5-10 Checking Usernames 
+# Learning Objective: Create list and verify uniqueness of each entry. 
+
+currentUsers = ['Tex', 'Spert', 'klumps20', 'porridgeboi', 'tonythetiger']
+#print(currentUsers)
+
+lowerCurrentUsers = []
+
+for user in currentUsers:
+	lowerCurrentUsers.append(user.lower()) 
+
+#print(lowerCurrentUsers)
+
+newUsers = ['randobob', 'stoopidpeet', 'tex', 'porridgeboi', 'calebrini'] 
+
+for user in newUsers: 
+	if user in lowerCurrentUsers:
+		print(f"Sorry, {user} is taken, please try another username.\n")
+	else:
+		print(f'The username {user} is available.\n')