calculateSurfaceAreaCube()

Step 1: Understand the Problem

Firstly, understand that a Cube is a three-dimensional figure with six matching square faces. Therefore, to calculate the surface area of a cube, you will need to know the length of one edge. The formula for the surface area of a cube is 6 * edge^2. So the function will take one argument, the length of the edge, and will use this to calculate the surface area.

function calculateSurfaceAreaCube(edge) {
 // function implementation will go here
}

Step 2: Implement the Formula

In this step we implement the formula in our function. This is achieved by multiplying 6 by the square of the cube's edge. In JavaScript, we can square a number by using the Math.pow() function or the exponentiation operator (**).

function calculateSurfaceAreaCube(edge) {
 return 6 * Math.pow(edge, 2);
}

Step 3: Validate the Input

We should perform basic input validation. Since the edge should be a number and greater than zero, we can return an error in case the function receives invalid input.

function calculateSurfaceAreaCube(edge) {
 if (typeof edge !== 'number' || edge <= 0) {
  throw new Error('The edge must be a positive number.');
 }
 return 6 * Math.pow(edge, 2);
}

Step 4: Testing the function

Now that we haven't received any errors, we can test the function with a few examples to assure that it's returning the correct outputs.

console.log(calculateSurfaceAreaCube(3)); // prints: 54
console.log(calculateSurfaceAreaCube(5)); // prints: 150

Step 5: Conclusion

In this post, you learned how to write a function in JavaScript that calculates the surface area of a cube. This function takes the edge length as an argument, validates the input, and then uses the formula for calculating the surface area of a cube to output the result.