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Explanation\n# Constructor:\n The Calculator class initializes the result with the provided initialValue.\n\n# Arithmetic Methods:\n\nadd: Adds the given value 
# Explanation\n# Constructor:\n The Calculator class initializes the result with the provided initialValue.\n\n# Arithmetic Methods:\n\nadd: Adds the given value to the result and returns the current instance.\nsubtract: Subtracts the given value from the result and returns the current instance.\nmultiply: Multiplies the result by the given value and returns the current instance.\ndivide: Divides the result by the given value. It checks if the value is zero and throws an error if it is.\npower: Raises the result to the power of the given value and returns the current instance.\ngetResult: Returns the final result after all operations have been performed.\n\nExample Outputs\nThe first example shows how to chain the operations to get the final result of 8.\nThe second example demonstrates multiplication and exponentiation, yielding 100.\nThe third example illustrates error handling for division by zero.\n\nTo create the Calculator class that supports method chaining and performs various mathematical operations, you can follow these steps:\n\n# Constructor: \nThe constructor should accept a number that initializes the result.\n# Method Implementations: \nEach method (add, subtract, multiply, divide, power) should perform its respective operation, update the result, and return the current instance of the Calculator for chaining.\nError Handling: The divide method should handle division by zero by throwing an error with a specific message.\nGet Result: The getResult method should return the current result.\n# Code\n```javascript []\nclass Calculator {\n  constructor(initialValue) {\n    this.result = initialValue; // Initialize the result with the provided value\n  }\n\n  add(value) {\n    this.result += value; // Add the value to the result\n    return this; // Return the current instance for chaining\n  }\n\n  subtract(value) {\n    this.result -= value; // Subtract the value from the result\n    return this; // Return the current instance for chaining\n  }\n\n  multiply(value) {\n    this.result *= value; // Multiply the result by the value\n    return this; // Return the current instance for chaining\n  }\n\n  divide(value) {\n    if (value === 0) {\n      throw new Error("Division by zero is not allowed"); // Handle division by zero\n    }\n    this.result /= value; // Divide the result by the value\n    return this; // Return the current instance for chaining\n  }\n\n  power(value) {\n    this.result **= value; // Raise the result to the power of the value\n    return this; // Return the current instance for chaining\n  }\n\n  getResult() {\n    return this.result; // Return the current result\n  }\n}\n\n// Example Usage\nconsole.log(new Calculator(10).add(5).subtract(7).getResult()); // Output: 8\nconsole.log(new Calculator(2).multiply(5).power(2).getResult()); // Output: 100\ntry {\n  console.log(new Calculator(20).divide(0).getResult()); // Should throw an error\n} catch (error) {\n  console.log(error.message); // Output: "Division by zero is not allowed"\n}\n\n```
['JavaScript']