Completed "Why we use types" exercises.

Author: anosidium

prep exercises/Why we use types exercise 1.py

@@ -0,0 +1,9 @@
+def double(value):
+    return value * 2
+
+# I predict that double("22") will produce 22.0
+
+result = double("22")
+print(result) # Actual result is 2222
+
+# This is because the string is duplicated twice, "22" + "22" = "22" * 2, it is repeating the a sequence of string.

prep exercises/Why we use types exercise 2.py

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+def double(number):
+    return number * 3
+
+print(double(10))
+
+# There are two possible ways to fix the bug.
+
+# 1. The function name is wrong, it needs to be named to triple
+# 2. Or the function name is correct but the calculation is wrong, it should be return * 2
+
+def double(number):
+    return number * 2
+
+value = 10
+print(double(value))