findCube()

Step 1: Understand the task

Before we start coding, we need to understand what we are asked to do. We're going to create a JavaScript function that should calculate the cube of a given number. Keep in mind that the cube of a number is the result of multiplying the number by itself twice.

For instance, if the number is 2, its cube would be 2*2*2 = 8.

Step 2: Initialize the function

Start by declaring a function that takes a number as an input. Let's name our function findCube:

function findCube(num) {

}

This simple code block declares a function findCube. The function is currently empty and does nothing. 'num' is the placeholder for any number we will use as an input when calling this function.

Step 3: Calculate the cube

Inside our function, the next step is to calculate the cube of a number. As mentioned before, to calculate the cube of a number, you multiply that number by itself twice. You can write this operation in JavaScript using the Math.pow function or just by writing 'num * num * num':

function findCube(num) {
    let cube = num * num * num;
}

The cube variable now holds the result of our multiplication. However, our function still doesn't provide any results back.

Step 4: Returning the results

In order for our function to communicate the results back, we need to use the return statement. The return statement stops the execution of a function and sends a value back to the point where the function was called:

function findCube(num) {
    let cube = num * num * num;
    return cube;
}

With this, our function now calculates and provides back the cube of an input number!

Step 5: Testing the function

To wrap everything up, you should test your function to make sure it works as expected. Here is a simple test that checks if the cube of 2 is 8:

console.log(findCube(2)); // should output 8

Conclusion

There you have it! We have just created a JavaScript function that calculates the cube of a number. Breaking down a problem into simpler steps helps to comprehend and solve it effectively. It also helps a lot to incrementally build your code, starting by understanding the problem, implementing base elements and gradually adding functionality until the goal is achieved.

The final JavaScript function to find the cube of a number is:

function findCube(num) {
    let cube = num * num * num;
    return cube;
}