How Can I Efficiently Convert Integers to Their Written Number Representations in Code?

Optimizing Integer-to-Word Conversion in Code

Many programming tasks require converting integers into their word representations. While a straightforward approach might use extensive lookup tables, more efficient algorithms exist.

This article explores a recursive function designed for this conversion. The core logic leverages separate arrays for ones ("One", "Two", etc.), teens ("Eleven", "Twelve", etc.), tens ("Twenty", "Thirty", etc.), and thousands ("Thousand", "Million", etc.) for streamlined processing.

The FriendlyInteger function acts as the recursive engine. It handles each numerical group (ones, tens, hundreds, etc.) individually and concatenates the results. For single-digit numbers (less than 10), it directly uses the "ones" array. Numbers between 10 and 19 utilize the "teens" array. Numbers from 20 to 99 combine the "tens" and "ones" components. Numbers exceeding 100 process the hundreds digit and recursively handle the remaining digits. Finally, it incorporates the appropriate thousands group (thousand, million, etc.).

The IntegerToWritten function extends this functionality to handle negative numbers. It detects the negative sign, processes the absolute value using FriendlyInteger, and prepends "negative" to the result. The final output is a string representing the integer in words.

This recursive approach offers a performance advantage over large lookup tables, providing a more efficient and adaptable solution for integer-to-word conversions within your applications.

The above is the detailed content of How Can I Efficiently Convert Integers to Their Written Number Representations in Code?. For more information, please follow other related articles on the PHP Chinese website!