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Spell Out a Nonnegative Integer

CarvanaSoftware Engineer · Onsite
EasySoftware EngineerOnsiteCoding & Algorithms

Last updated

This question evaluates a candidate's ability to decompose integers and implement precise string-formatting logic, including mapping numeric values to their English word equivalents and managing scale units and boundary conditions.

Given a nonnegative integer, return its English words representation.

Implement a function that handles numbers from 0 through 2,147,483,647 inclusive.

Requirements:

  • Return "Zero" for input 0.
  • Use standard American English scale words: Thousand, Million, and Billion.
  • Do not include the word and.
  • Use single spaces between words and no leading or trailing spaces.
  • Capitalize each word as shown in the examples.

Examples:

  • Input: 7 Output: "Seven"
  • Input: 19 Output: "Nineteen"
  • Input: 123 Output: "One Hundred Twenty Three"
  • Input: 1005 Output: "One Thousand Five"
  • Input: 1234567 Output: "One Million Two Hundred Thirty Four Thousand Five Hundred Sixty Seven"
  • Input: 2147483647 Output: "Two Billion One Hundred Forty Seven Million Four Hundred Eighty Three Thousand Six Hundred Forty Seven"