Easy Explanation
The Calculator class is designed to provide basic mathematical operations (addition, subtraction, multiplication, division, and exponentiation) while allowing m
**The Calculator class is designed to provide basic mathematical operations (addition, subtraction, multiplication, division, and exponentiation) while allowing method chaining. The class constructor initializes the result variable with a given starting value. Each method (except getResult) modifies the result and returns the instance itself (this), enabling method chaining. The divide method includes an error check to prevent division by zero, throwing an error message if an attempt is made to divide by zero. The getResult method simply returns the current value of result. This design ensures that users can perform a sequence of operations fluently in a single expression.**

### Explanation:
1. Constructor (constructor(value)): Initializes the result with the provided value.
1. add(value): Adds value to result and returns this for chaining.
1. subtract(value): Subtracts value from result and returns this.
1. multiply(value): Multiplies result by value and returns this.
1. divide(value): Checks if value is 0, throws an error if so, otherwise divides result by value and returns this.
1. power(value): Raises result to the power of value and returns this.
getResult(): Returns the final computed result.

# Code
```javascript []
class Calculator {
    /** 
     * @param {number} value
     */
    constructor(value) {
        this.result = value;
    }
    
    /** 
     * @param {number} value
     * @return {Calculator}
     */
    add(value) {
        this.result += value;
        return this;
    }
    
    /** 
     * @param {number} value
     * @return {Calculator}
     */
    subtract(value) {
        this.result -= value;
        return this;
    }
    
    /** 
     * @param {number} value
     * @return {Calculator}
     */  
    multiply(value) {
        this.result *= value;
        return this;
    }
    
    /** 
     * @param {number} value
     * @return {Calculator}
     */
    divide(value) {
        if (value === 0) {
            throw new Error("Division by zero is not allowed");
        }
        this.result /= value;
        return this;
    }
    
    /** 
     * @param {number} value
     * @return {Calculator}
     */
    power(value) {
        this.result = Math.pow(this.result, value);
        return this;
    }
    
    /** 
     * @return {number}
     */
    getResult() {
        return this.result;
    }
}

```
['JavaScript']