Basic Calculator (Add, Subtract, Multiply, Divide) double Calculate(double a, double b, char op) { return op switch { '+' => a + b, Follow on: '-' => a - b, '*' => a * b, '/' => b != 0 ?
a / b : throw new DivideByZeroException(),
_ => throw new ArgumentException("Invalid operator"),
Explanation:
Simple switch statement performing basic arithmetic, with divide-by-zero check.