JavaScript: Converts a specified number to an array of digits

JavaScript fundamental (ES6 Syntax): Exercise-7 with Solution

Number to Array of Digits

Write a JavaScript program to convert a specified number into an array of digits.

Note: Convert the number to a string, using the spread operator (...) to build an array.

• Use Math.abs() to strip the number's sign.
• Convert the number to a string, using the spread operator (...) to build an array.
• Use Array.prototype.map() and parseInt() to transform each value to an integer.

Sample Solution:

JavaScript Code:

// Convert a number into an array of its digits.
// Define a function called `digitize` that takes a number `n`.
const digitize = n =>
  // Convert the number to a string, then split it into an array of characters.
  [...`${n}`]
    // Map each character to its corresponding integer value.
    .map(i => parseInt(i));

// Test cases
console.log(digitize(123)); // Output: [1, 2, 3]
console.log(digitize(1230)); // Output: [1, 2, 3, 0]

Output:

[1,2,3]
[1,2,3,0]

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-1-7 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that converts a given number into an array of its individual digits.
• Write a JavaScript function that accepts a number and returns an array of digits in reverse order.
• Write a JavaScript program that transforms a negative number into an array of digits, preserving the sign separately.

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