Skip to content

Commit e775089

Browse files
somacdivadsomacdivad
committed
Merge branch 'rename-challenges'
2 parents bb69aab + e7cefbf commit e775089

23 files changed

+1155
-0
lines changed

‎ch04-strings-and-string-methods/5-challenge-pick-apart-your-users-input.py

Lines changed: 9 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,9 @@
1+
# 4.5 - Challenge: Pick Apart Your User's Input
2+
# Solution to code challenge
3+
4+
5+
# Return the upper-case first letter entered by the user
6+
7+
user_input = input("Tell me your password: ")
8+
first_letter = user_input[0]
9+
print("The first letter you entered was:", first_letter.upper())

‎ch04-strings-and-string-methods/9-challenge-turn-your-user-into-a-l33t-h4x0r.py

Lines changed: 17 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
1+
# 4.9 - Challenge: Turn Your User Into a L33t H4x0r
2+
# Solution to challenge
3+
4+
5+
# Turn a user's input into leetspeak
6+
7+
my_text = input("Enter some text: ")
8+
9+
my_text = my_text.replace("a", "4")
10+
my_text = my_text.replace("b", "8")
11+
my_text = my_text.replace("e", "3")
12+
my_text = my_text.replace("l", "1")
13+
my_text = my_text.replace("o", "0")
14+
my_text = my_text.replace("s", "5")
15+
my_text = my_text.replace("t", "7")
16+
17+
print(my_text)

‎ch05-numbers-in-python/3-challenge-perform-calculations-on-user-input.py

Lines changed: 10 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,10 @@
1+
# 5.3 - Challenge: Perform Calculations on User Input
2+
# Solution to challenge
3+
4+
5+
# Receive two input numbers and calculate their power
6+
7+
base = input("Enter a base: ")
8+
exponent = input("Enter an exponent: ")
9+
result = float(base) ** float(exponent)
10+
print(f"{base} to the power of {exponent} = {result}")

‎ch06-functions-and-loops/3-challenge-convert-temperatures.py

Lines changed: 38 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,38 @@
1+
# 6.3 - Challenge: Convert temperatures
2+
# Solution to challenge
3+
4+
5+
def convert_cel_to_far(temp_cel):
6+
"""Return the Celsius temperature temp_cel converted to Fahrenheit."""
7+
temp_far = temp_cel * (9 / 5) + 32
8+
return temp_far
9+
10+
11+
def convert_far_to_cel(temp_far):
12+
"""Return the Fahrenheit temperature temp_far converted to Celsius."""
13+
temp_cel = (temp_far - 32) * (5 / 9)
14+
return temp_cel
15+
16+
17+
# Prompt the user to input a Fahrenheit temperature.
18+
temp_far = input("Enter a temperature in degrees F: ")
19+
20+
# Convert the temperature to Celsius.
21+
# Note that `temp_far` must be converted to a `float`
22+
# since `input()` returns a string.
23+
temp_cel = convert_far_to_cel(float(temp_far))
24+
25+
# Display the converted temperature
26+
print(f"{temp_far} degrees F = {temp_cel:.2f} degrees C")
27+
28+
# You could also use `round()` instead of the formatting mini-language:
29+
# print(f"{temp_far} degrees F = {round(temp_cel, 2)} degrees C"")
30+
31+
# Prompt the user to input a Celsius temperature.
32+
temp_cel = input("\nEnter a temperature in degrees C: ")
33+
34+
# Convert the temperature to Fahrenheit.
35+
temp_far = convert_cel_to_far(float(temp_cel))
36+
37+
# Display the converted temperature
38+
print(f"{temp_cel} degrees C = {temp_far:.2f} degrees F")

‎ch06-functions-and-loops/5-challenge-track-your-investments.py

Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,18 @@
1+
# 6.5 - Challenge: Track Your Investments
2+
# Solution to challenge
3+
4+
5+
# Calculate compound interest to track the growth of an investment
6+
7+
8+
def invest(amount, rate, years):
9+
for year in range(1, years + 1):
10+
amount = amount * (1 + rate)
11+
print(f"year {year}: ${amount:,.2f}")
12+
13+
14+
amount = float(input("Enter a principal amount: "))
15+
rate = float(input("Enter an anual rate of return: "))
16+
years = int(input("Enter a number of years: "))
17+
18+
invest(amount, rate, years)

‎ch08-conditional-logic/4-challenge-find-the-factors-of-a-number.py

Lines changed: 10 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,10 @@
1+
# 8.4 - Challenge: Find the Factors of a Number
2+
# Solution to challenge
3+
4+
5+
# Display all the factors of a number chosen by the user
6+
7+
num = int(input("Enter a positive integer: "))
8+
for divisor in range(1, num + 1):
9+
if num % divisor == 0:
10+
print(f"{divisor} is a factor of {num}")

‎ch08-conditional-logic/8a-challenge-simulate-a-coin-toss-experiment.py

Lines changed: 55 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,55 @@
1+
# 8.8 - Challenge: Simulate a Coin Toss Experiment
2+
# Solution to challenge
3+
4+
5+
# Simulate the results of a series of coin tosses and track the results
6+
7+
# This one is tricky to structure correctly. Try writing out the logic before
8+
# you start coding. Some additional pointers if you're stuck:
9+
# 1. You will need to use a `for` loop over a range of trials.
10+
# 2. For each trial, first you should check the outcome of the first flip.
11+
# 3. Make sure you add the first flip to the total number of flips.
12+
# 4. After the first toss, you'll need another loop to keep flipping while you
13+
# get the same result as the first flip.
14+
15+
import random
16+
17+
18+
def coin_flip():
19+
"""Randomly return 'heads' or 'tails'."""
20+
if random.randint(0, 1) == 0:
21+
return "heads"
22+
else:
23+
return "tails"
24+
25+
26+
flips = 0
27+
num_trials = 10_000
28+
29+
for trial in range(num_trials):
30+
if coin_flip() == "heads":
31+
# Increment the number of flips by 1
32+
flips = flips + 1
33+
while coin_flip() == "heads":
34+
# Keep incrementing the total number of flips
35+
# until "tails" is returned by coin_flip()
36+
flips = flips + 1
37+
# Once coin_flip() return "tails", the loop will exit,
38+
# but we need to add one more to flips to track the
39+
# last flip that generated "tails"
40+
flips = flips + 1
41+
else:
42+
# coin_flip() returned "tails" on the first flip.
43+
# Increment the number of flips by 1
44+
flips = flips + 1
45+
while coin_flip == "tails":
46+
# Keep incrementing the total number of flips
47+
# until "heads" is returned by coin_flip()
48+
flips = flips + 1
49+
# Once coin_flip() returns "heads", the loop will exit,
50+
# but we need to add one more to flips to track the
51+
# last flip that generated "heads"
52+
flips = flips + 1
53+
54+
avg_flips_per_trial = flips / num_trials
55+
print(f"The average number of flips per trial is {avg_flips_per_trial}.")

‎ch08-conditional-logic/8b-challenge-simulate-a-coin-toss-experiment.py

Lines changed: 42 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,42 @@
1+
# 8.8 - Challenge: Simulate a Coin Toss Experiement
2+
# Alternative solution to challenge
3+
4+
5+
# Simulate the results of a series of coin tosses and track the results
6+
7+
# This one is tricky to structure correctly. Try writing out the logic before
8+
# you start coding. Some additional pointers if you're stuck:
9+
# 1. You will need to use a `for` loop over a range of trials.
10+
# 2. For each trial, first you should check the outcome of the first flip.
11+
# 3. Make sure you add the first flip to the total number of flips.
12+
# 4. After the first toss, you'll need another loop to keep flipping while you
13+
# get the same result as the first flip.
14+
15+
import random
16+
17+
18+
def coin_flip():
19+
"""Randomly return 'heads' or 'tails'."""
20+
if random.randint(0, 1) == 0:
21+
return "heads"
22+
else:
23+
return "tails"
24+
25+
26+
flips = 0
27+
num_trials = 10_000
28+
29+
for trial in range(num_trials):
30+
# Flip the coin once and increment the flips tally by 1
31+
first_flip = coin_flip()
32+
flips = flips + 1
33+
# Continue flipping the coin and updating the tally until
34+
# a different result is returned by coin_flips()
35+
while coin_flip() == first_flip:
36+
flips = flips + 1
37+
# Increment the flip tally once more to account for the
38+
# final flip with a different result
39+
flips = flips + 1
40+
41+
avg_flips_per_trial = flips / num_trials
42+
print(f"The average number of flips per trial is {avg_flips_per_trial}.")

‎ch08-conditional-logic/8c-challenge-simulate-a-coin-toss-experiment.py

Lines changed: 37 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,37 @@
1+
# 8.8 - Challenge: Simulate a Coin Toss Experiement
2+
# Alternative solution to challenge using functions
3+
4+
5+
# Simulate the results of a series of coin tosses and track the results
6+
7+
# This one is tricky to structure correctly. Try writing out the logic before
8+
# you start coding. Some additional pointers if you're stuck:
9+
# 1. You will need to use a `for` loop over a range of trials.
10+
# 2. For each trial, first you should check the outcome of the first flip.
11+
# 3. Make sure you add the first flip to the total number of flips.
12+
# 4. After the first toss, you'll need another loop to keep flipping while you
13+
# get the same result as the first flip.
14+
15+
from random import randint
16+
17+
18+
def single_trial():
19+
toss = randint(0, 1)
20+
total_flips = 1
21+
22+
while toss == randint(0, 1):
23+
total_flips += 1
24+
toss = randint(0, 1)
25+
26+
total_flips += 1
27+
return total_flips
28+
29+
30+
def flip_trial_avg(num_trials):
31+
total = 0
32+
for trial in range(num_trials):
33+
total += single_trial()
34+
return total / num_trials
35+
36+
37+
print(f"The average number of coin flips was {flip_trial_avg(10000)}")

‎ch08-conditional-logic/9-challenge-simulate-an-election.py

Lines changed: 35 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,35 @@
1+
# 8.9 - Challenge: Simulate an Election
2+
# Solution to challenge
3+
4+
5+
# Simulate the results of an election using a Monte Carlo simulation
6+
7+
from random import random
8+
9+
total_A_wins = 0
10+
total_B_wins = 0
11+
12+
trials = 10_000
13+
for trial in range(0, trials):
14+
A_win = 0
15+
B_win = 0
16+
if random() < 0.87: # 1st region
17+
A_win += 1
18+
else:
19+
B_win += 1
20+
if random() < 0.65: # 2nd region
21+
A_win += 1
22+
else:
23+
B_win += 1
24+
if random() < 0.17: # 3rd region
25+
A_win += 1
26+
else:
27+
B_win += 1
28+
# Determine overall election outcome
29+
if A_win > B_win:
30+
total_A_wins += 1
31+
else:
32+
total_B_wins += 1
33+
34+
print(f"Probability A wins: {total_A_wins / trials}")
35+
print(f"Probability B wins: {total_B_wins / trials}")

0 commit comments

Comments
 (0)
pFad - Phonifier reborn

Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.

Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.


Alternative Proxies:

Alternative Proxy

pFad Proxy

pFad v3 Proxy

pFad v4 Proxy