Declare a Variable in C#

To declare a variable in C#, you write the type, followed by the name, followed by = and the initial value:

string choice = "1";

• string — the type of value the variable will hold
• choice — the name you use to refer to this variable
• "1" — the initial value assigned to it

Type Inference with var#

Instead of writing the type explicitly, you can use var and let the compiler figure it out:

var choice = "1";

The type is inferred from the value on the right. This works as long as you assign a value when declaring the variable.

Common Types#

Naming Rules#

• Names can contain letters, digits, and underscores.
• Names cannot start with a digit.
• Names are case-sensitive: choice and Choice are different variables.
• Use clear, descriptive names that reflect the value being stored.

Resources#

• Variables (Microsoft)↗ (external link)

Backlinks#

• Variable