Static & Private Class Fields

Why use a private static field for PI?

class CircleCalculator {
  static #PI = 3.14159;
  
  static calculateArea(radius) {
    return this.#PI * radius * radius;
  }
  
  static calculateCircumference(radius) {
    return 2 * this.#PI * radius;
  }
}

To improve performance
To prevent modification of the constant
Using a private static field for PI provides several benefits: 1) Prevents external modification of the constant, 2) Ensures consistent value across all calculations, 3) Encapsulates implementation detail within the class, 4) Allows changing the precision without affecting external code, 5) Maintains single source of truth for the value, 6) More secure than using Object.freeze on a public field.
To save memory
To make calculations faster

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