JavaScript Program to Check for a Cube Number

Posted in JavaScript Tutorial

Updated on Jan 11, 2024

By Mari Selvan

👁️ 112 - Views

⏳ 4 mins

💬 1 Comment

JavaScript Program to Check for a Cube Number

Photo Credit to CodeToFun

🙋 Introduction

In the realm of programming, mathematical properties of numbers often lead to interesting and practical applications. One such property is being a cube number. A cube number is an integer that is the cube of an integer.

In this tutorial, we'll delve into a JavaScript program that efficiently checks whether a given number is a perfect cube or not.

📄 Example

Let's take a look at the JavaScript code that accomplishes this functionality.

isPerfectCube.js

Copied

// Function to check if a number is a perfect cube
function isPerfectCube(number) {
  // Calculate the cube root of the number
  const cubeRoot = Math.cbrt(number);

  // Check if the cube root is close to an integer
  return Math.abs(cubeRoot - Math.round(cubeRoot)) < 1e-10;
}

// Driver program
// Replace this value with your desired number
const number = 27;

// Check if the number is a perfect cube
if (isPerfectCube(number)) {
  console.log(`${number} is a perfect cube.`);
} else {
  console.log(`${number} is not a perfect cube.`);
}

💻 Testing the Program

To test the program with different numbers, simply replace the value of the number variable.

Output

27 is a perfect cube.

Run the script to check if the number is a perfect cube.

🧠 How the Program Works

The program defines a function isPerfectCube that takes a number as input and returns true if it is a perfect cube, and false otherwise.
Inside the function, it calculates the cube root of the number using the Math.cbrt function.
It then checks if the cube root is close to an integer using a tolerance value (1e-10 in this case).
The program initializes a variable with a number and calls the isPerfectCube function to determine if it's a perfect cube.

📏 Between the Given Range

Let's take a look at the JavaScript code that identifies and displays cube numbers in the range from 1 to 50.

isCubeNumber.js

Copied

// Function to check if a number is a cube number
function isCubeNumber(num) {
  // Calculate the cube root of the number
  let cubeRoot = Math.cbrt(num);

  // Check if the cube root is an integer
  return cubeRoot % 1 === 0;
}

// Function to find and display cube numbers in a specified range
function displayCubeNumbersInRange(start, end) {
  console.log(`Cube numbers in the range ${start} to ${end}:`);

  for (let i = start; i <= end; i++) {
    if (isCubeNumber(i)) {
      console.log(i);
    }
  }
}

// Define the range
const startRange = 1;
const endRange = 50;

// Call the function to display cube numbers
displayCubeNumbersInRange(startRange, endRange);

💻 Testing the Program

Output

Cube numbers in the range 1 to 50:
1 8 27

Run the script to see the cube numbers in the range from 1 to 50.

🧠 How the Program Works

The program defines a function isCubeNumber that checks if a given number is a cube number by calculating its cube root and verifying if it's an integer.
Another function, displayCubeNumbersInRange, iterates through the specified range (1 to 50) and prints cube numbers using the isCubeNumber function.
The range is set from 1 to 50, as specified.

🧐 Understanding the Concept of Cube Number

A cube number is the result of raising an integer to the power of 3. For example, 2 * 2 * 2 = 8, so 8 is a cube number.

🎢 Optimizing the Program

The provided program is straightforward, but you might consider optimizing it further. For instance, you can explore alternative methods for checking if a number is a cube number without using the cbrt function.

Feel free to incorporate and modify this code as needed for your specific use case. Happy coding!