calculateSurfaceAreaCylinder()

Step 1: Understanding the problem

Before we jump into writing the solution, it's important to have a clear understanding of what we are trying to solve. In this case, we want to write a JavaScript function that calculates the surface area of a cylinder. The formula to calculate the surface area of a cylinder is 2πr(h + r) where r is the radius of the base of the cylinder and h is the height of the cylinder.

Step 2: Setting up the function signature

Let's start by creating a function named calculateSurfaceAreaCylinder. This function will take two parameters: radius and height.

function calculateSurfaceAreaCylinder(radius, height) {

}

Step 3: Implementing the formula

Now that we have our function set up, let's implement the formula inside the function.

function calculateSurfaceAreaCylinder(radius, height) {
    let surfaceArea = 2 * Math.PI * radius * (height + radius);
}

Step 4: Returning the result

The above code will calculate the surface area of the cylinder. However, our function currently doesn't do anything with this result. To fix this, we need to return the result from the function.

function calculateSurfaceAreaCylinder(radius, height) {
    let surfaceArea = 2 * Math.PI * radius * (height + radius);
    return surfaceArea;
}

Step 5: Testing the function

We have now completed our function and it should work correctly. But let's test it to be sure. We will call the function with a radius of 3 and a height of 5.

console.log(calculateSurfaceAreaCylinder(3, 5));

Conclusion

Finally, we have written a JavaScript function to calculate the surface area of a cylinder using the provided radius and height. Here is our complete function.

function calculateSurfaceAreaCylinder(radius, height) {
    let surfaceArea = 2 * Math.PI * radius * (height + radius);
    return surfaceArea;
}

console.log(calculateSurfaceAreaCylinder(3, 5));

With this method, we can easily calculate the surface area of any cylinder with just the radius and the height. Always remember to return a value from your function when a result is expected.