Operators and Expressions

C# in Visual Studio 2026 — a hands-on guide for developers at every level.

Arithmetic Operators

int a = 10, b = 3;
Console.WriteLine(a / b);        // 3  (integer division truncates)
Console.WriteLine((double)a / b); // 3.333... (cast to double first)
Console.WriteLine(a % b);        // 1

Assignment and Compound Operators

int x = 5;
x += 3;   // x = x + 3  → 8
x -= 2;   // x = x - 2  → 6
x *= 4;   // x = x * 4  → 24
x /= 6;   // x = x / 6  → 4
x++;       // x = x + 1  → 5
x--;       // x = x - 1  → 4

Comparison Operators

int n = 10;
Console.WriteLine(n == 10);  // True
Console.WriteLine(n != 5);   // True
Console.WriteLine(n > 8);    // True
Console.WriteLine(n <= 10);  // True

Logical Operators

bool a = true, b = false;
Console.WriteLine(a && b);   // False — AND
Console.WriteLine(a || b);   // True  — OR
Console.WriteLine(!a);       // False — NOT

The Math Class

Console.WriteLine(Math.Abs(-7));       // 7
Console.WriteLine(Math.Pow(2, 10));    // 1024
Console.WriteLine(Math.Sqrt(144));    // 12
Console.WriteLine(Math.Round(3.567, 2)); // 3.57
Console.WriteLine(Math.Max(10, 20));   // 20