What a programming language is in Intro to Computing - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a message using a programming language.

Intro to Computing

print([1])

Drag options to blanks, or click blank then click option'

A"Hello, world!"

BHello, world!

Cprint

Dmessage

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to use quotes around the text.

Trying to print a word without quotes.

The print function requires a string inside quotes to display text.

2fill in blank

medium

Complete the code to assign a number to a variable in a programming language.

Intro to Computing

age = [1]

Drag options to blanks, or click blank then click option'

A20

Btwenty

C"twenty"

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Putting numbers inside quotes when assigning.

Using variable names instead of values.

Numbers are written without quotes when assigning to variables.

3fill in blank

hard

Fix the error in the code to correctly add two numbers.

Intro to Computing

result = 5 [1] 3

Drag options to blanks, or click blank then click option'

A/

B*

C-

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

Using symbols that do not perform addition.

The plus sign (+) adds two numbers together.

4fill in blank

hard

Fill both blanks to create a variable holding a greeting message.

Intro to Computing

[1] = [2]

Drag options to blanks, or click blank then click option'

Agreeting

B"Hello!"

Cmessage

DHello

Attempts:

3 left

💡 Hint

Common Mistakes

Putting quotes around variable names.

Not using quotes for text values.

Variable names go on the left, strings with quotes go on the right.

5fill in blank

hard

Fill all three blanks to create a simple program that prints a personalized greeting.

Intro to Computing

name = [1]
message = [2] + name
print([3])

Drag options to blanks, or click blank then click option'

A"Alice"

B"Hello, "

Cmessage

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around strings.

Printing the wrong variable.

Not using + to join strings.

Assign a name string, add it to a greeting string, then print the combined message.

Practice

1. What is a programming language?

easy

A. A tool to clean computer screens

B. A way to tell computers what to do using special words and rules

C. A software that runs games only

D. A type of computer hardware

Solution

1. Step 1: Understand the definition of programming language

   A programming language is a set of words and rules used to write instructions for computers.

2. Step 2: Match the definition to the options

   A way to tell computers what to do using special words and rules correctly describes this as telling computers what to do using special words and rules.

3. Final Answer:

   A way to tell computers what to do using special words and rules -> Option B

4. Quick Check:

   Programming language = instructions for computers [OK]

Hint: Programming language = instructions + special words [OK]

Common Mistakes:

• Confusing programming language with hardware
• Thinking it's only for games
• Mixing it up with software tools

2. Which of the following is the correct way to write a simple instruction in a programming language?

easy

A. print('Hello, world!')

B. print 'Hello, world!'

C. echo Hello, world!

D. say('Hello, world!')

Solution

1. Step 1: Identify correct syntax for printing text in Python

   In Python, the correct syntax to print text is using the print function with parentheses and quotes.

2. Step 2: Compare options to Python syntax

   print('Hello, world!') uses print('Hello, world!') which is correct syntax in Python 3.

3. Final Answer:

   print('Hello, world!') -> Option A

4. Quick Check:

   Python print uses parentheses and quotes [OK]

Hint: Python print needs parentheses and quotes [OK]

Common Mistakes:

• Omitting parentheses in print
• Using shell commands like echo
• Using incorrect function names

3. What will the following code output?

language = 'Python'
print(f'I love {language}!')

medium

A. I love language!

B. I love {language}!

C. I love Python!

D. SyntaxError

Solution

1. Step 1: Understand f-string usage in Python

   The code uses an f-string which replaces {language} with the value of the variable language.

2. Step 2: Substitute variable value in the string

   Since language = 'Python', the output will be 'I love Python!'.

3. Final Answer:

   I love Python! -> Option C

4. Quick Check:

   f-string replaces variables with values [OK]

Hint: f-strings insert variable values inside {} [OK]

Common Mistakes:

• Thinking {language} prints literally
• Confusing variable name with string
• Expecting syntax error from f-string

4. Find the error in this code snippet:

if language = 'Python':
    print('Correct language!')

medium

A. The '=' should be '==' in the if condition

B. The print statement is missing parentheses

C. The variable 'language' is not defined

D. The colon ':' is missing after the if statement

Solution

1. Step 1: Identify the use of '=' in if condition

   The single '=' is an assignment operator, not a comparison operator.

2. Step 2: Correct the operator for comparison

   In conditions, '==' is used to check equality, so '=' should be replaced with '=='.

3. Final Answer:

   The '=' should be '==' in the if condition -> Option A

4. Quick Check:

   Use '==' to compare values in conditions [OK]

Hint: Use '==' for comparison, '=' for assignment [OK]

Common Mistakes:

• Using '=' instead of '==' in conditions
• Forgetting colon ':' after if
• Assuming print needs no parentheses

5. You want to create a program that asks a user for their name and then greets them. Which sequence of steps correctly uses a programming language to do this?

hard

A. 1. Use print() to get the name2. Store it in a variable3. Use input() to greet the user

B. 1. Use input() to get the name2. Use print() without storing name3. Use input() to greet the user

C. 1. Store name directly without input2. Use print() without variables3. End program

D. 1. Use input() to get the name2. Store it in a variable3. Use print() with an f-string to greet the user

Solution

1. Step 1: Get user input correctly

   Use input() function to ask the user for their name and store it in a variable.

2. Step 2: Use stored variable to greet

   Use print() with an f-string to include the stored name in the greeting message.

3. Final Answer:

   1. Use input() to get the name
   2. Store it in a variable
   3. Use print() with an f-string to greet the user -> Option D

4. Quick Check:

   Input, store, then print with variable [OK]

Hint: Input first, store, then print greeting [OK]

Common Mistakes:

• Using print instead of input to get data
• Not storing input before printing
• Trying to greet without variable