calculateVolumeCube()

Step 1: Understanding the problem

Before we jump into the coding part, it is essential to understand the problem first. We are supposed to write a function to calculate the volume of a cube. The cube is simple and easy to work with because all its sides are equal in length. The formula to calculate a cube's volume is volume = sideˆ3 or volume = side * side * side.

let side = 5; 
let volume = side * side * side; 

Step 2: Declaring the function

We'll be following the standard syntax for declaring a function in javascript, which is function functionName(parameters) {}. We're going to call our function "calculateVolumeCube" and it will take one parameter, side.

function calculateVolumeCube(side) {
  
}

Step 3: Implementing the logic

Now, inside the function, we'll implement our logic of calculating the cube's volume. It's pretty straightforward: we just need to multiply the length of the side or the cube by itself three times or use the power function.

function calculateVolumeCube(side) {
  
  let volume = Math.pow(side, 3);
}

Step 4: Returning the result

The function is doing the calculation just fine but we need a way to retrieve the result. We have to use the keyword return, followed by the result that we want to return, which in our case is the variable volume.

function calculateVolumeCube(side) {
  
  let volume = Math.pow(side, 3);
  
  return volume;
}

Step 5: Testing the function

In the last step, we'll do a test run of our function. Call the function by its name and provide a value for the parameter side. Store the result in the variable result and log it to the console.

let result = calculateVolumeCube(5);
console.log(result); //prints: 125

Conclusion

And that's it! We have successfully written a function to calculate the volume of a cube. The final, full code should look like this:

function calculateVolumeCube(side) {
  
  let volume = Math.pow(side, 3);
  
  return volume;
}

let result = calculateVolumeCube(5);
console.log(result); //prints: 125