Iterating over strings in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print each character in the string.

Python

for char in [1]:
    print(char)

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

A"hello"

B12345

C['h', 'e', 'l', 'l', 'o']

Dhello

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the string.

Using a list instead of a string.

The string must be in quotes to be treated as a string. So "hello" is correct.

2fill in blank

medium

Complete the code to count how many times 'a' appears in the string.

Python

count = 0
for char in "banana":
    if char == [1]:
        count += 1
print(count)

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

A'b'

Ba

C"a"

D'a'

Attempts:

3 left

💡 Hint

Common Mistakes

Using double quotes instead of single quotes (both work but only one is correct here).

Not using quotes at all.

We check if the character equals the letter 'a' using single quotes.

3fill in blank

hard

Fix the error in the code to print each character in the string.

Python

word = "code"
for [1] in word:
    print(char)

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

Aword

Bchar

Cletter

Dc

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different variable name in the loop and print statement.

Using the string name as loop variable.

The loop variable must be named 'char' to match the print statement.

4fill in blank

hard

Fill both blanks to create a dictionary with letters as keys and their uppercase as values.

Python

result = { [1]: [2] for [1] in "abc" }

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

Achar

Bchar.upper()

Cletter

Dletter.upper()

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names for key and loop variable.

Not calling upper() method correctly.

Use 'char' as the loop variable and 'char.upper()' to get uppercase letters.

5fill in blank

hard

Fill all three blanks to create a dictionary with letters as keys, their index as values, but only for letters after 'b'.

Python

result = { [1]: [2] for [1], [2] in enumerate("abcde") if [3] > 1 }

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

Aletter

Bindex

Didx

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up index and letter variables.

Using wrong variable names in the if condition.

Use 'letter' and 'index' from enumerate, and filter where index > 1.