String length and membership test in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the length of the string.

Python

word = "hello"
print(len([1]))

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

Aword

B"word"

Clen(word)

Dhello

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around the variable name like "word" which is a string literal, not the variable.

Using len(word) inside len() causing an error.

The len() function needs the variable word to get the string length.

2fill in blank

medium

Complete the code to check if the letter 'a' is in the string.

Python

text = "apple"
if [1] in text:
    print("Found a")

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

A"a"

Ba

C'text'

D"text"

Attempts:

3 left

💡 Hint

Common Mistakes

Using the variable name without quotes, which causes a NameError.

Using quotes around the variable name instead of the letter.

To check membership, the letter must be a string literal like "a".

3fill in blank

hard

Fix the error in the code to check if 'x' is not in the string.

Python

my_str = "example"
if 'x' [1] my_str:
    print("No x found")

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

Ain

Bnot in

Cnot

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using only not without in.

Using != which compares equality, not membership.

The correct syntax to check if a character is not in a string is not in.

4fill in blank

hard

Fill both blanks to create a dictionary of words with length greater than 3.

Python

words = ["cat", "lion", "dog", "tiger"]
lengths = {word: [1] for word in words if len(word) [2] 3}

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

Alen(word)

B>

C<

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself instead of its length.

Using less than operator which filters wrong words.

The dictionary maps each word to its length, but only if the length is greater than 3.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and values longer than 4.

Python

words = ["apple", "pear", "banana", "kiwi"]
result = [1]: [2] for w in words if len(w) [3] 4}

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

Aw.upper()

Bw

C>

Dlen(w)

Attempts:

3 left

💡 Hint

Common Mistakes

Using length as value instead of the word.

Using less than operator which filters wrong words.

The dictionary uses uppercase words as keys and original words as values, filtering words longer than 4.