Error Identification and Basic C# Operators

Flashcards covering error identification, variable declarations, case sensitivity, and common operators (arithmetic, assignment, relational, and logical) from the provided notes.

What is the purpose of Console.WriteLine in C#?

To print text to the console.

What data type is declared for a variable storing a person's name, such as 'Nia'?

string

In the context of the variable string name = "Nia";, what is the string literal value?

Nia

Why is int age = "Twenty"; an error?

An int variable cannot be assigned a string; this is a type mismatch.

Why might Console.WriteLine(Name) cause an error when a variable named 'name' is defined?

C# is case-sensitive; 'Name' is different from 'name'.

What is the error in the sequence where a variable is used before being declared (username = Mike; Console.WriteLine(username); string username =
)?

Using a variable before it is declared; declare it before use.

Is it valid in C# to use a variable before declaring it in the same scope?

No.

Which operator represents addition?

• (Addition)

Which operator represents subtraction?

• (Subtraction)

Which operator represents multiplication?

• (Multiplication)

Which operator represents division?

/ (Division)

Which operator represents modulus?

% (Modulus)

What does the assignment operator '=' do?

Assigns a value to a variable.

What does '+=' do?

Adds and assigns (x += 3 means x = x + 3).

What does '-=' do?

Subtracts and assigns.

What does '*=' do?

Multiplies and assigns.

What does '/=' do?

Divides and assigns.

What does '%=' do?

Modulus and assigns.

What does '==' mean?

Equal to.

What does '!=' mean?

Not equal to.

What does '>' mean?

Greater than.

What does '<' mean?

Less than.

What does '>=' mean?

Greater than or equal to.

What does '<=' mean?

Less than or equal to.

What does '&&' stand for?

Logical AND.

What does '||' stand for?

Logical OR.

What does '

Logical NOT.