New exercise for control flow: "FizzBuzz" (#8)

* feat(06): add an exercise, "FizzBuzz"

* docs(06): use better keywords for background

Author: sohnryang

06-controlflow/fizzbuzz-answer.py

@@ -0,0 +1,43 @@
+def fizzbuzz(n):
+    """
+    Print numbers from 1 to `n`.
+    For multiples of 3, print "fizz" instead of the number.
+    For multiples of 5, print "buzz" instead of the number.
+    For multiples of both 3 and 5, print "fizzbuzz" instead of the number.
+
+    >>> fizzbuzz(3)
+    1
+    2
+    fizz
+    >>> fizzbuzz(15)
+    1
+    2
+    fizz
+    4
+    buzz
+    fizz
+    7
+    8
+    fizz
+    buzz
+    11
+    fizz
+    13
+    14
+    fizzbuzz
+    """
+    for x in range(1, n + 1):
+        if x % 15 == 0:
+            print("fizzbuzz")
+        elif x % 3 == 0:
+            print("fizz")
+        elif x % 5 == 0:
+            print("buzz")
+        else:
+            print(x)
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod(verbose=True)

06-controlflow/fizzbuzz.py

@@ -0,0 +1,34 @@
+def fizzbuzz(n):
+    """
+    Print numbers from 1 to `n`.
+    For multiples of 3, print "fizz" instead of the number.
+    For multiples of 5, print "buzz" instead of the number.
+    For multiples of both 3 and 5, print "fizzbuzz" instead of the number.
+
+    >>> fizzbuzz(3)
+    1
+    2
+    fizz
+    >>> fizzbuzz(15)
+    1
+    2
+    fizz
+    4
+    buzz
+    fizz
+    7
+    8
+    fizz
+    buzz
+    11
+    fizz
+    13
+    14
+    fizzbuzz
+    """
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod(verbose=True)

06-controlflow/guide.md

@@ -1 +1,9 @@
-# control flow
+# control flow
+
+## FizzBuzz
+
+- difficulty: ★☆☆
+- time: ~ 15m for beginners
+- background: conditional, iteration
+
+Solve fizzbuzz in classical way.