rakash
diff --git a/‎ch08-conditional-logic/7-simulate-events-and-calculate-probabilities.py
Lines changed: 4 additions & 4 deletions b/‎ch08-conditional-logic/7-simulate-events-and-calculate-probabilities.py
Lines changed: 4 additions & 4 deletions
diff --git a/‎ch08-conditional-logic/8a-challenge.py
Lines changed: 39 additions & 15 deletions b/‎ch08-conditional-logic/8a-challenge.py
Lines changed: 39 additions & 15 deletions
diff --git a/‎ch08-conditional-logic/8b-challenge.py
Lines changed: 24 additions & 10 deletions b/‎ch08-conditional-logic/8b-challenge.py
Lines changed: 24 additions & 10 deletions
@@ -14,12 +14,12 @@ def roll():
 
 # Exercise 2
 # Simulate 10,000 rolls of a die and display the average number rolled.
-trials = 10000
+num_rolls = 10_000
 total = 0
 
-for trial in range(0, trials):
+for trial in range(num_rolls):
     total = total + roll()
 
-avg_roll = total / trials
+avg_roll = total / num_rolls
 
-print(f"The average result of {trials} throws is {avg_roll}")
+print(f"The average result of {num_rolls} rolls is {avg_roll}")
@@ -12,20 +12,44 @@
 # 4. After the first toss, you'll need another loop to keep flipping while you
 #    get the same result as the first flip.
 
-from random import randint
+import random
+
+
+def coin_flip():
+    """Randomly return 'heads' or 'tails'."""
+    if random.randint(0, 1) == 0:
+        return "heads"
+    else:
+        return "tails"
+
 
 flips = 0
-trials = 10000
-
-for trial in range(0, trials):
-    flips += 1  # first flip
-    if randint(0, 1) == 0:  # flipped tails on first flip
-        while randint
10000
(0, 1) == 0:  # keep flipping tails
-            flips += 1
-        flips += 1  # finally flipped heads
-    else:  # otherwise, flipped heads on first flip
-        while randint(0, 1) == 1:  # keep flipping heads
-            flips += 1
-        flips += 1  # finally flipped tails
-
-print(flips / trials)
+num_trials = 10_000
+
+for trial in range(num_trials):
+    if coin_flip() == "heads":
+        # Increment the number of flips by 1
+        flips = flips + 1
+        while coin_flip() == "heads":
+            # Keep incrementing the total number of flips
+            # until "tails" is returned by coin_flip()
+            flips = flips + 1
+        # Once coin_flip() return "tails", the loop will exit,
+        # but we need to add one more to flips to track the
+        # last flip that generated "tails"
+        flips = flips + 1
+    else:
+        # coin_flip() returned "tails" on the first flip.
+        # Increment the number of flips by 1
+        flips = flips + 1
+        while coin_flip == "tails":
+            # Keep incrementing the total number of flips
+            # until "heads" is returned by coin_flip()
+            flips = flips + 1
+        # Once coin_flip() returns "heads", the loop will exit,
+        # but we need to add one more to flips to track the
+        # last flip that generated "heads"
+        flips = flips + 1
+
+avg_flips_per_trial = flips / num_trials
+print(f"The average number of flips per trial is {avg_flips_per_trial}.")
@@ -12,17 +12,31 @@
 # 4. After the first toss, you'll need another loop to keep flipping while you
 #    get the same result as the first flip.
 
-from random import randint
+import random
 
 
-trials = 100_000
-flips = 0
+def coin_flip():
+    """Randomly return 'heads' or 'tails'."""
+    if random.randint(0, 1) == 0:
+        return "heads"
+    else:
+        return "tails"
 
-for trial in range(1, trials):
-    first_flip = randint(0, 1)
-    flips += 1
-    while randint(0, 1) == first_flip:
-        flips += 1
-    flips += 1
 
-print(f"The average number of coin flips was {flips / trials}")
+flips = 0
+num_trials = 10_000
+
+for trial in range(num_trials):
+    # Flip the coin once and increment the flips tally by 1
+    first_flip = coin_flip()
+    flips = flips + 1
+    # Continue flipping the coin and updating the tally until
+    # a different result is returned by coin_flips()
+    while coin_flip() == first_flip:
+        flips = flips + 1
+    # Increment the flip tally once more to account for the
+    # final flip with a different result
+    flips = flips + 1
+
+avg_flips_per_trial = flips / num_trials
+print(f"The average number of flips per trial is {avg_flips_per_trial}.")