Multiple parameters in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a function that takes two parameters and returns their sum.

Python

def add_numbers(a, [1]):
    return a + b

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

Ab

Bc

Cx

Dy

Attempts:

3 left

💡 Hint

Common Mistakes

Using a parameter name that is not used in the function body.

Forgetting to add the second parameter.

The function needs two parameters named a and b to add them correctly.

2fill in blank

medium

Complete the code to call the function with two arguments 5 and 7.

Python

result = add_numbers([1], 7)
print(result)

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

A3

B5

C10

D7

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the wrong number as the first argument.

Passing only one argument.

The function add_numbers expects two numbers. We pass 5 as the first argument and 7 as the second.

3fill in blank

hard

Fix the error in the function definition to accept three parameters.

Python

def multiply_three(a, b, [1]):
    return a * b * c

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

Ac

Bd

Ce

Df

Attempts:

3 left

💡 Hint

Common Mistakes

Using a parameter name different from the variable in the return statement.

Forgetting to add the third parameter.

The third parameter must be c to match the variable used in the return statement.

4fill in blank

hard

Fill both blanks to create a function that returns the average of two numbers.

Python

def average([1], [2]):
    return (x + y) / 2

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

Ax

By

Ca

Db

Attempts:

3 left

💡 Hint

Common Mistakes

Using parameter names that do not match the variables in the return statement.

Swapping the order of parameters incorrectly.

The parameters must be x and y to match the variables used in the return statement.

5fill in blank

hard

Fill all three blanks to create a function that returns a dictionary with keys as parameter names and values as their squares, only if the value is greater than 0.

Python

def squares_dict([1], [2], [3]):
    return {k: v**2 for k, v in zip(['a', 'b', 'c'], [[1], [2], [3]]) if v > 0}

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

Aa

Bb

Cc

Dd

Attempts:

3 left

💡 Hint

Common Mistakes

Using parameter names that do not match the keys in the dictionary.

Not matching the order of parameters and values in the zip function.

The function parameters must be a, b, and c to match the keys and values zipped in the dictionary comprehension.

Practice

1. What does it mean when a Python function has multiple parameters?
def greet(name, age):

easy

A. The function can only have one parameter at a time.

B. The function can only return multiple values.

C. The function must be called without any arguments.

D. The function can receive more than one piece of information to work with.

Solution

1. Step 1: Understand function parameters

   Parameters inside parentheses let a function accept inputs to use inside its code.

2. Step 2: Multiple parameters mean multiple inputs

   When separated by commas, each parameter is a separate input the function expects.

3. Final Answer:

   The function can receive more than one piece of information to work with. -> Option D

4. Quick Check:

   Multiple parameters = multiple inputs [OK]

Hint: Multiple parameters mean multiple inputs separated by commas [OK]

Common Mistakes:

• Thinking parameters are outputs
• Believing functions can't have more than one parameter
• Confusing parameters with function return values

2. Which of the following is the correct way to define a function with two parameters named x and y?

easy

A. def add(x; y):

B. def add(x y):

C. def add(x, y):

D. def add[x, y]:

Solution

1. Step 1: Check function definition syntax

   Python functions use parentheses to list parameters separated by commas.

2. Step 2: Identify correct separator and brackets

   Parameters must be separated by commas inside parentheses, not spaces, semicolons, or brackets.

3. Final Answer:

   def add(x, y): -> Option C

4. Quick Check:

   Parameters separated by commas inside () [OK]

Hint: Use commas between parameters inside parentheses [OK]

Common Mistakes:

• Using spaces instead of commas
• Using semicolons or brackets instead of commas and parentheses
• Missing parentheses around parameters

3. What will be the output of this code?

def multiply(a, b):
    return a * b

result = multiply(3, 4)
print(result)

medium

A. 12

B. 7

C. 34

D. Error

Solution

1. Step 1: Understand function call with parameters

   The function multiply receives 3 and 4 as inputs for a and b.

2. Step 2: Calculate the return value

   It returns the product 3 * 4 = 12, which is stored in result and printed.

3. Final Answer:

   12 -> Option A

4. Quick Check:

   3 times 4 equals 12 [OK]

Hint: Multiply inputs given to function parameters [OK]

Common Mistakes:

• Adding instead of multiplying
• Concatenating numbers as strings
• Expecting an error due to parameters

4. Find the error in this function definition:

def greet(name, age)
    print(f"Hello {name}, you are {age} years old.")

medium

A. Missing colon at the end of the function header.

B. Parameters should be inside square brackets.

C. The print statement should be outside the function.

D. Function name cannot be 'greet'.

Solution

1. Step 1: Check function header syntax

   Python requires a colon ':' at the end of the function header line.

2. Step 2: Identify missing colon

   The given function header lacks the colon after the closing parenthesis.

3. Final Answer:

   Missing colon at the end of the function header. -> Option A

4. Quick Check:

   Function header must end with ':' [OK]

Hint: Always put ':' after function header parentheses [OK]

Common Mistakes:

• Forgetting the colon ':'
• Using wrong brackets for parameters
• Misplacing print statement

5. You want to write a function describe_person that takes name, age, and city as parameters and returns a sentence like:
"Alice is 30 years old and lives in Paris."
Which function definition and return statement is correct?

hard

A. def describe_person(name, age, city):
print(f"{name} is {age} years old and lives in {city}.")

B. def describe_person(name, age, city):
return f"{name} is {age} years old and lives in {city}."

C. def describe_person(name, age, city):
return name + " is " + age + " years old and lives in " + city + "."

D. def describe_person(name, age, city):
return f"{name} is {age} years old lives in {city}."

Solution

1. Step 1: Check function parameters and string formatting

   The function must accept three parameters and return a formatted string with all parts included.

2. Step 2: Compare return statements

   def describe_person(name, age, city): return f"{name} is {age} years old and lives in {city}." uses an f-string correctly with all parts and punctuation. def describe_person(name, age, city): return name + " is " + age + " years old and lives in " + city + "." tries string addition but age is an int, causing error. def describe_person(name, age, city): print(f"{name} is {age} years old and lives in {city}.") prints instead of returning. def describe_person(name, age, city): return f"{name} is {age} years old lives in {city}." misses 'and' in the sentence.

3. Final Answer:

   def describe_person(name, age, city): return f"{name} is {age} years old and lives in {city}." -> Option B

4. Quick Check:

   Use f-string with all parameters and return [OK]

Hint: Use f-string with all parameters and return the string [OK]

Common Mistakes:

• Concatenating strings with int without conversion
• Using print instead of return
• Missing words or punctuation in the string