Verbatim and raw string literals in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a verbatim string literal.

C Sharp (C#)

string path = [1]"C:\\Users\\Admin";

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

A@

B%

C$

D#

Attempts:

3 left

💡 Hint

Common Mistakes

Using # or $ instead of @ for verbatim strings.

Not escaping backslashes in normal strings.

The @ symbol before a string in C# creates a verbatim string literal, which treats backslashes as normal characters.

2fill in blank

medium

Complete the code to declare a raw string literal with three double quotes.

C Sharp (C#)

string json = [1]"""
{
  "name": "John"
}""";

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

A"""

B@

C$

D'''

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes instead of triple double quotes.

Using @ symbol which is for verbatim strings, not raw strings.

Raw string literals in C# use triple double quotes """ to allow multi-line strings without escapes.

3fill in blank

hard

Fix the error in the raw string literal declaration.

C Sharp (C#)

string text = [1]"""
Line 1
Line 2
""";

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

A""

B"""

C@

D"

Attempts:

3 left

💡 Hint

Common Mistakes

Using only two double quotes causes syntax errors.

Using @ symbol instead of triple quotes for raw strings.

Raw string literals require triple double quotes """ to start and end the string.

4fill in blank

hard

Fill both blanks to create a verbatim string with a newline character.

C Sharp (C#)

string message = [1]"Hello[2]World";

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

A@

B\n

D$

Attempts:

3 left

💡 Hint

Common Mistakes

Using actual newline character instead of \n inside verbatim strings.

Not using @ symbol for verbatim strings.

Verbatim strings use @ and to include a newline character literally, you use \n inside the string.

5fill in blank

hard

Fill all three blanks to create a raw string literal with embedded quotes and a newline.

C Sharp (C#)

string quote = [1]"""
She said, [2]Hello, World![3]
""";

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

A"""

B""

C"

D'

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes instead of double quotes inside the raw string.

Not using triple double quotes to start and end the raw string.

Raw string literals start and end with triple double quotes """. Inside, double quotes are written as single double quotes ". Newlines are preserved automatically.

Practice

1. What is the main purpose of a verbatim string literal in C# (starting with @)?

easy

A. To write strings that ignore escape sequences and can span multiple lines easily.

B. To create strings that automatically convert to uppercase.

C. To define strings that are encrypted at compile time.

D. To declare strings that are immutable and cannot be changed.

Solution

1. Step 1: Understand verbatim string syntax

   Verbatim strings start with @ and allow writing strings with backslashes and new lines without escape sequences.

2. Step 2: Identify the purpose

   This makes writing file paths and multi-line text easier and more readable.

3. Final Answer:

   To write strings that ignore escape sequences and can span multiple lines easily. -> Option A

4. Quick Check:

   Verbatim strings ignore escapes = A [OK]

Hint: Verbatim strings start with @ and ignore escape sequences [OK]

Common Mistakes:

• Thinking verbatim strings convert text case
• Assuming verbatim strings encrypt content
• Confusing immutability with verbatim syntax

2. Which of the following is the correct syntax for a raw string literal in C# 11+?

easy

A. """This is a raw string"""

B. @"This is a raw string"

C. 'This is a raw string'

D. "This is a raw string"

Solution

1. Step 1: Recall raw string literal syntax

   Raw string literals in C# 11+ use triple double quotes to start and end the string.

2. Step 2: Compare options

   """This is a raw string""" uses triple double quotes correctly; @"This is a raw string" is verbatim string syntax, not raw string.

3. Final Answer:

   """This is a raw string""" -> Option A

4. Quick Check:

   Raw strings use triple quotes = D [OK]

Hint: Raw strings use triple quotes """ at start and end [OK]

Common Mistakes:

• Confusing verbatim strings (@) with raw strings (""")
• Using single quotes for strings
• Using normal double quotes for raw strings

3. What will be the output of this C# code?

string path = @"C:\Users\Admin";
string raw = """C:\Users\Admin""";
Console.WriteLine(path);
Console.WriteLine(raw);

medium

A. C:\\Users\\Admin
C:\\Users\\Admin

B. C:\Users\Admin
C:\Users\Admin

C. C:UsersAdmin
C:UsersAdmin

D. C:\UsersAdmin
C:\Users\Admin

Solution

1. Step 1: Understand verbatim string output

   The verbatim string @"C:\Users\Admin" outputs the path with single backslashes because escapes are ignored.

2. Step 2: Understand raw string output

   The raw string """C:\Users\Admin""" preserves the backslashes exactly as typed, so output is the same.

3. Final Answer:

   C:\Users\Admin C:\Users\Admin -> Option B

4. Quick Check:

   Both print path with single backslashes = B [OK]

Hint: Both verbatim and raw strings preserve backslashes as typed [OK]

Common Mistakes:

• Expecting double backslashes in output
• Confusing escape sequences in verbatim strings
• Thinking raw strings remove backslashes

4. Identify the error in this code snippet:

string text = @"This is a "quoted" word.";

medium

A. Raw string literals require triple quotes, not @.

B. Verbatim strings cannot contain double quotes.

C. No error, code is correct.

D. Missing escape for inner quotes inside verbatim string.

Solution

1. Step 1: Check verbatim string rules for quotes

   In verbatim strings, double quotes inside must be doubled to escape them ("" for one ").

2. Step 2: Identify the error

   The code uses single double quotes inside verbatim string, causing syntax error.

3. Final Answer:

   Missing escape for inner quotes inside verbatim string. -> Option D

4. Quick Check:

   Double quotes inside verbatim need doubling = C [OK]

Hint: Double inner quotes "" inside verbatim strings to escape [OK]

Common Mistakes:

• Using single double quotes inside verbatim strings
• Confusing verbatim and raw string syntax
• Assuming verbatim strings allow unescaped quotes

5. You want to store this multi-line JSON string exactly as shown, including indentation and quotes, in C# 11+. Which is the best way to do it?

{
  "name": "Alice",
  "age": 30
}

hard

A. Use a normal string with \n for new lines and escaped quotes.

B. Use a verbatim string with @ and escape all quotes with backslashes.

C. Use a raw string literal with triple quotes preserving all formatting.

D. Use string concatenation for each line.

Solution

1. Step 1: Understand formatting needs

   The JSON string has multiple lines, indentation, and quotes that must be preserved exactly.

2. Step 2: Choose best string literal

   Raw string literals with triple quotes preserve all formatting and quotes without escapes, making code clean and readable.

3. Final Answer:

   Use a raw string literal with triple quotes preserving all formatting. -> Option C

4. Quick Check:

   Raw strings preserve multi-line and quotes = A [OK]

Hint: Use raw strings for exact multi-line text with quotes [OK]

Common Mistakes:

• Escaping quotes manually in verbatim strings
• Using normal strings with many escapes
• Concatenating strings unnecessarily