Lambda syntax and behavior in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a lambda function that adds 5 to its input.

Python

add_five = lambda x: x [1] 5
print(add_five(10))

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.

Forgetting the operator between x and 5.

The lambda function adds 5 to the input using the + operator.

2fill in blank

medium

Complete the code to create a lambda function that returns True if a number is even.

Python

is_even = lambda n: n [1] 2 == 0
print(is_even(4))

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

A+

B%

C-

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or multiplication instead of modulo.

Forgetting to compare the result to zero.

The modulo operator % gives the remainder. If remainder is 0 when divided by 2, the number is even.

3fill in blank

hard

Fix the error in the lambda function that should multiply input by 3.

Python

triple = lambda x: x [1] 3
print(triple(7))

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

A*

B+

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or subtraction instead of multiplication.

Using division which changes the value incorrectly.

The multiplication operator * is needed to multiply the input by 3.

4fill in blank

hard

Fill in the blank to create a lambda that returns True if a word's length is greater than 4.

Python

check_length = lambda word: len(word) [1] 4
print(check_length('hello'))

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

A>

B<

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than or equal operators instead of greater than.

Using equality operator which checks for exact length.

The operator > checks if the length is greater than 4.

5fill in blank

hard

Fill all three blanks to create a lambda that filters numbers greater than 10 and doubles them.

Python

result = list(filter(lambda x: x [1] 10, map(lambda x: x [2] [3], [5, 12, 7, 15])))
print(result)

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

A>

B*

C2

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than operator for filtering.

Using addition instead of multiplication for doubling.

Forgetting to provide the multiplier.

The lambda filters numbers greater than 10 using >, then doubles them by multiplying by 2.