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Pythonprogramming~5 mins

First Python Program (Hello World) - Cheat Sheet & Quick Revision

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Recall & Review
beginner
What is the purpose of the print() function in Python?
The print() function shows text or values on the screen. It helps us see the output of our program.
Click to reveal answer
beginner
Write the simplest Python code to display the message: Hello World
Use print("Hello World") to show the message on the screen.
Click to reveal answer
beginner
Why do we put text inside quotes in print()?
Quotes tell Python that the text is a message (string) to show exactly as it is.
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beginner
What happens if you forget the parentheses in print in Python 3?
Python will give an error because print is a function and needs parentheses to work.
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beginner
What is the output of this code?
print("Hello World")
The output will be:
Hello World
Click to reveal answer
Which Python function is used to display text on the screen?
Adisplay()
Bprint()
Cinput()
Dshow()
What will this code print?
print("Hello")
Ahello
B"Hello"
CHello
Dprint("Hello")
In Python 3, what is missing in this code?
print "Hello World"
AParentheses around print
BParentheses around the text
CQuotes around Hello World
DNothing is missing
Why do we use quotes inside print()?
ATo mark text as a message to print
BTo make the program faster
CTo add colors to text
DTo comment the code
What will happen if you run this code?
print(Hello World)
AIt will print Hello World
BIt will print the word print
CIt will print nothing
DIt will cause an error
Explain how to write your first Python program that shows 'Hello World' on the screen.
Think about how to tell Python to show a message.
You got /4 concepts.
    What are common mistakes beginners make when writing the first Python program?
    Focus on syntax rules for the print function.
    You got /4 concepts.

      Practice

      (1/5)
      1. What does the print() function do in Python?
      easy
      A. Creates a new variable
      B. Displays text or values on the screen
      C. Saves data to a file
      D. Deletes a program

      Solution

      1. Step 1: Understand print() purpose and match to options

        The print() function is used to show messages or values on the screen. Displays text or values on the screen correctly describes this.

      2. Final Answer:

        Displays text or values on the screen -> Option B

      3. Quick Check:

        print() shows output = Displays text or values on the screen [OK]
      Hint: Remember: print() shows output on screen [OK]
      Common Mistakes:
      • Thinking print() saves data
      • Confusing print() with input()
      • Assuming print() creates variables
      2. Which of the following is the correct syntax to print "Hello, World!" in Python?
      easy
      A. printf("Hello, World!")
      B. print(Hello, World!)
      C. echo "Hello, World!"
      D. print("Hello, World!")

      Solution

      1. Step 1: Identify correct print syntax in Python

        Python requires text inside quotes using the print() function. print("Hello, World!") matches this correct syntax.

      2. Final Answer:

        print("Hello, World!") -> Option D

      3. Quick Check:

        Quotes + print() = Correct syntax [OK]
      Hint: Use print() with quotes around text [OK]
      Common Mistakes:
      • Missing quotes around text
      • Using echo or printf (not Python)
      • Forgetting parentheses
      3. What will be the output of this code?
      print("Hello, World!")
      medium
      A. SyntaxError
      B. "Hello, World!"
      C. Hello, World!
      D. print("Hello, World!")

      Solution

      1. Step 1: Analyze print() output

        The print() function shows text inside quotes without the quotes. The code outputs Hello, World! with no quotes or errors.

      2. Final Answer:

        Hello, World! -> Option C

      3. Quick Check:

        print("text") outputs text without quotes [OK]
      Hint: print() shows text without quotes on screen [OK]
      Common Mistakes:
      • Expecting quotes in output
      • Thinking code prints code itself
      • Confusing output with error
      4. Find the error in this code:
      print(Hello, World!)
      medium
      A. Missing quotes around text
      B. Missing parentheses
      C. Wrong function name
      D. Extra comma inside print

      Solution

      1. Step 1: Identify the syntax error in print()

        Text must be inside quotes as a string. Hello, World! lacks quotes, causing Missing quotes around text.

      2. Final Answer:

        Missing quotes around text -> Option A

      3. Quick Check:

        Text needs quotes in print() [OK]
      Hint: Always put text inside quotes in print() [OK]
      Common Mistakes:
      • Forgetting quotes
      • Removing parentheses
      • Using wrong function name
      5. You want to print two lines:
      Hello, World!
      and
      Welcome to Python.
      Which code will do this correctly?
      hard
      A. print("Hello, World!\nWelcome to Python.")
      B. print("Hello, World!") print("Welcome to Python.")
      C. print("Hello, World!\Welcome to Python.")
      D. print("Hello, World!" + "Welcome to Python.")

      Solution

      1. Step 1: Determine correct code for multiple lines

        \n inside a string creates a newline. print("Hello, World!\nWelcome to Python.") uses \n correctly for two lines.

      2. Final Answer:

        print("Hello, World!\nWelcome to Python.") -> Option A

      3. Quick Check:

        Use \n inside string for new line [OK]
      Hint: Use \n inside quotes for new line in print() [OK]
      Common Mistakes:
      • Using multiple print without separation
      • Wrong escape character
      • Concatenating without space or newline