Python Input and Output Operations

1# Basic print statement
2print("Hello, Python learner!")
3
4# Printing multiple items
5print("The answer is", 42)
6
7# Printing with variables
8name = "Alex"
9age = 15
10print("Name:", name, "Age:", age)
11
12# Output:
13# Hello, Python learner!
14# The answer is 42
15# Name: Alex Age: 15

1# Using f-strings (Python 3.6+)
2name = "Emma"
3score = 95.5
4print(f"Student {name} scored {score} points")
5
6# Using format() method
7print("Student {} scored {} points".format(name, score))
8
9# Using format specifiers
10print("Score: {:.1f}%".format(score))  # Show only 1 decimal place
11
12# Output:
13# Student Emma scored 95.5 points
14# Student Emma scored 95.5 points
15# Score: 95.5%

1# Countdown without newlines
2print("Counting down: ", end="")
3print("3... ", end="")
4print("2... ", end="")
5print("1... ", end="")
6print("Go!")
7
8# Output:
9# Counting down: 3... 2... 1... Go!

1# Getting numeric input
2age_str = input("How old are you? ")
3age = int(age_str)  # Convert string to integer
4
5height_str = input("How tall are you (in meters)? ")
6height = float(height_str)  # Convert string to float
7
8print(f"In 5 years, you'll be {age + 5} years old.")
9print(f"Half your height is {height / 2} meters.")
10
11# Example output:
12# How old are you? 14
13# How tall are you (in meters)? 1.65
14# In 5 years, you'll be 19 years old.
15# Half your height is 0.825 meters.

1print("Hello! I'm a simple chatbot.")
2name = input("What's your name? ")
3
4print(f"Nice to meet you, {name}!")
5feeling = input("How are you feeling today? ")
6
7if "good" in feeling.lower() or "great" in feeling.lower() or "happy" in feeling.lower():
8    print("That's wonderful to hear!")
9elif "bad" in feeling.lower() or "sad" in feeling.lower() or "tired" in feeling.lower():
10    print("I'm sorry to hear that. I hope your day gets better!")
11else:
12    print(f"Thanks for sharing that you feel {feeling}.")
13
14age_str = input("How old are you? ")
15try:
16    age = int(age_str)
17    if age < 18:
18        print(f"Cool! You have {18 - age} more years until you're an adult.")
19    else:
20        print(f"Nice! You've been an adult for {age - 18} years.")
21except ValueError:
22    print("That doesn't seem to be a valid age, but that's okay!")
23
24print(f"It was nice talking with you, {name}. Have a great day!")

1print("Tell me a short story (press Enter twice when done):")
2story_lines = []
3line = input()
4
5while line:
6    story_lines.append(line)
7    line = input()
8
9story = "
10".join(story_lines)
11print("
12Your story:")
13print(story)
14
15# Example:
16# Tell me a short story (press Enter twice when done):
17# Once upon a time, there was a Python programmer.
18# They loved coding day and night.
19# The end.
20# 
21# Your story:
22# Once upon a time, there was a Python programmer.
23# They loved coding day and night.
24# The end.

1def show_menu():
2    print("
3==== Calculator Menu ====")
4    print("1. Add two numbers")
5    print("2. Subtract two numbers")
6    print("3. Multiply two numbers")
7    print("4. Divide two numbers")
8    print("5. Exit")
9    return input("Enter your choice (1-5): ")
10
11def get_numbers():
12    a = float(input("Enter first number: "))
13    b = float(input("Enter second number: "))
14    return a, b
15
16choice = ""
17while choice != "5":
18    choice = show_menu()
19    
20    if choice == "1":
21        a, b = get_numbers()
22        print(f"Result: {a} + {b} = {a + b}")
23    elif choice == "2":
24        a, b = get_numbers()
25        print(f"Result: {a} - {b} = {a - b}")
26    elif choice == "3":
27        a, b = get_numbers()
28        print(f"Result: {a} * {b} = {a * b}")
29    elif choice == "4":
30        a, b = get_numbers()
31        if b == 0:
32            print("Error: Cannot divide by zero!")
33        else:
34            print(f"Result: {a} / {b} = {a / b}")
35    elif choice == "5":
36        print("Thank you for using the calculator. Goodbye!")
37    else:
38        print("Invalid choice. Please try again.")

1def mad_libs_game():
2    print("Welcome to Mad Libs!")
3    print("I'll ask for some words, then create a funny story.")
4    
5    # Get inputs
6    name = input("Enter a name: ")
7    adjective1 = input("Enter an adjective: ")
8    adjective2 = input("Enter another adjective: ")
9    animal = input("Enter an animal: ")
10    verb1 = input("Enter a verb ending in 'ing': ")
11    verb2 = input("Enter another verb: ")
12    place = input("Enter a place: ")
13    number = input("Enter a number: ")
14    
15    # Create the story
16    story = f"""
17    Once upon a time, there was a {adjective1} person named {name}.
18    {name} loved {verb1} with their pet {animal} every day.
19    One day, while at the {place}, {name} saw {number} {adjective2} birds.
20    The birds started to {verb2} which made {name} laugh uncontrollably.
21    It was truly the most {adjective1} day of {name}'s life!
22    """
23    
24    # Display the result
25    print("
26Here's your story:")
27    print(story)
28
29# Run the game
30mad_libs_game()
31
32# Example output:
33# Welcome to Mad Libs!
34# I'll ask for some words, then create a funny story.
35# Enter a name: Skyler
36# Enter an adjective: silly
37# Enter another adjective: blue
38# Enter an animal: penguin
39# Enter a verb ending in 'ing': dancing
40# Enter another verb: sing
41# Enter a place: library
42# Enter a number: 42
43# 
44# Here's your story:
45# 
46# Once upon a time, there was a silly person named Skyler.
47# Skyler loved dancing with their pet penguin every day.
48# One day, while at the library, Skyler saw 42 blue birds.
49# The birds started to sing which made Skyler laugh uncontrollably.
50# It was truly the most silly day of Skyler's life!