String creation and literal types in C Sharp (C#) - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a string literal in C#?

A string literal is a sequence of characters enclosed in double quotes, like "Hello". It represents a fixed string value in the code.

beginner

How do you create a verbatim string literal in C#?

By prefixing the string with @, like @"C:\Users\Name". It treats backslashes and newlines as literal characters without needing escape sequences.

intermediate

What is the difference between a regular string literal and a verbatim string literal?

Regular string literals use escape sequences (like \n for newline). Verbatim string literals (with @) treat the string exactly as typed, including backslashes and newlines.

intermediate

Can you use double quotes inside a verbatim string literal? How?

Yes, by doubling the double quotes inside the string. For example: @"She said, ""Hello""." represents She said, "Hello".

beginner

What type does a string literal have in C#?

A string literal has the type System.String, which is an alias for the keyword string in C#.

Which of the following is a valid verbatim string literal in C#?

A @"C:\Program Files\App"

B "C:\Program Files\App"

C 'C:\Program Files\App'

D "C:/Program Files/App"

Option A uses @ to create a verbatim string literal, so backslashes are treated literally without needing double escaping.

How do you represent a newline character in a regular string literal?

A \n

B @n

C \newline

D newline

In regular string literals, \n is the escape sequence for a newline character.

What happens if you write @"Hello "World"" in C#?

A String with embedded quotes

B String with newline

C String with backslashes

D Compilation error due to unescaped quotes

Double quotes inside a verbatim string must be doubled to escape them. Writing @"Hello "World"" causes a compilation error.

Which keyword is an alias for System.String in C#?

A text

B string

C StringLiteral

D str

The keyword string is an alias for System.String in C#.

Which of these is NOT a valid way to create a string in C#?

A string s = "Hello";

B string s = @"Hello";

C string s = 'Hello';

D string s = new string(new char[] {'H','e','l','l','o'});

Single quotes are for char literals, not strings. So 'Hello' is invalid for a string.

Explain how to create and use verbatim string literals in C# and why they are useful.

Think about file paths and multiline text.

Describe the difference between regular string literals and verbatim string literals in C#.

Consider how newlines and backslashes are handled.