How text is stored (ASCII, Unicode) in Intro to Computing - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert the character 'A' to its ASCII number.

Intro to Computing

ascii_value = ord([1])

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

A"A"

BA

C'A'

D'a'

Attempts:

3 left

💡 Hint

Common Mistakes

Using the character without quotes causes an error.

Using double quotes is also correct but only one option is correct here.

The ord() function takes a single character as a string and returns its ASCII (or Unicode) number. The character must be in quotes.

2fill in blank

medium

Complete the code to convert the ASCII number 66 back to its character.

Intro to Computing

char = chr([1])

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

A66

B"66"

C'66'

Dchr

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a string like '66' causes a TypeError.

Passing the function name instead of a number causes an error.

The chr() function takes an integer ASCII (or Unicode) code and returns the corresponding character. The input must be an integer, not a string.

3fill in blank

hard

Fix the error in the code that tries to get the ASCII code of the string 'Hello'.

Intro to Computing

code = ord([1])

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

A'Hello'

B"Hello"

CHello

D'H'

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the whole string causes a TypeError.

Not using quotes around the character causes an error.

The ord() function only works with a single character. To get the ASCII code of the first letter in 'Hello', pass just 'H' in quotes.

4fill in blank

hard

Fill both blanks to create a dictionary mapping each character in 'abc' to its ASCII code.

Intro to Computing

ascii_map = { [1] for [2] in 'abc' }

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

A{char: ord(char)}

Bchar

Cc

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names in the loop.

Missing the colon between key and value in the dictionary.

This dictionary comprehension loops over each character in the string 'abc' and maps it to its ASCII code using ord().

5fill in blank

hard

Fill all three blanks to create a dictionary of characters and their Unicode codes for 'ñöç'.

Intro to Computing

unicode_map = { [1]: [2] for [3] in 'ñöç' }

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

Ach

Bord(ch)

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently.

Not calling ord() correctly.

This dictionary comprehension uses the variable ch to loop over each character in the string 'ñöç' and maps each character to its Unicode code using ord().