Merge pull request #28 from code-for-tomorrow/ch11-ke-hao

Ch. 11 Exercise Count Magical

Author: phrdang

2_intermediate/chapter11/practice/count_magical.py

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+# Write a function called count_magical
+# that returns the number of even numbers
+# in a given list. In the function,
+# if the number of evens is greater than
+# half of the length of the list, print "Magical"
+# Else, print "Not Magical"
+#
+# Write a function called main which tests
+# the count_magical function on at least
+# 3 different lists of integers. Use the main
+# function to test count_magical by calling main().
+
+# write code here

2_intermediate/chapter11/solutions/count_magical.py

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+# Write a function called count_magical
+# that returns the number of even numbers
+# in a given list. In the function,
+# if the number of evens is greater than
+# half of the length of the list, print "Magical"
+# Else, print "Not Magical"
+#
+# Write a function called main which tests
+# the count_magical function on at least
+# 3 different lists of integers. Use the main
+# function to test count_magical by calling main().
+
+
+def count_magical(my_list):
+    number_of_evens = 0
+    for n in my_list:
+        if n % 2 == 0:
+            number_of_evens += 1
+
+    if number_of_evens > len(my_list) / 2:
+        print("Magical")
+    else:
+        print("Not Magical")
+
+    return number_of_evens
+
+
+def main():
+    list_1 = [1, 2, 3, 4, 5, 6]  # not magical, 3 evens
+    list_2 = [0, 35, 1, 35, 2, 4]  # not magical, 3 evens
+    list_3 = [10, 20, 12, 3, -9]  # magical, 3 evens
+
+    print("Number of evens in list 1:", count_magical(list_1))
+    print("Number of evens in list 2:", count_magical(list_2))
+    print("Number of evens in list 3:", count_magical(list_3))
+
+
+main()