Number to Words Converter for Dutch

This NPM library is made for converting numbers into their word representations in Dutch

Deze NPM library is gemaakt om cijfers om te zetten in hun Nederlandse uitgeschreven vorm

Based on the original num-to-words and took inspiration from the german package

Features

• Convert integers and floats to words in Dutch
• Support for negative numbers and large numbers up to 16 characters, you can try for really large numbers but because of javascript limiations those won't be really accurate.
• Convert currency amounts into words, supporting the euro and the US dollar, other currencies can be added in the params of the function.
• Replace numbers in a string into words

Install

npm install num-to-words

Usage

Basic Conversion

Using require syntax:

const numtowords = require('num-to-words-nl');

console.log(numtowords.int_to_words(123)); // Outputs: "honderddrieëntwintig"
console.log(numtowords.float_to_words(45.75, { capitals: true })); // Outputs: "Vijfenveertig komma Vijfenzeventig"

Using ES6 import syntax

import { int_to_words, float_to_words } from 'num-to-words-nl';

console.log(int_to_words(123, { capitals: true })); // Outputs: "Honderddrieëntwintig"
console.log(float_to_words(45.75, { capitals: true })); // Outputs: "Vijfenveertig komma Vijfenzeventig"

The function takes 2 parameters,

Currency Conversion

const numtowords = require('num-to-words-nl');

console.log(numtowords.num_to_currency(999.99, 'USD')); // Outputs: "negenhonderdnegenennegentig dollar en negenennegentig cent"

replace numbers in a text

const numtowords = require('num-to-words-nl');

console.log(numtowords.replace_num_to_words("Ik heb 3 appels en 2 peren")); // Outputs: "Ik heb drie appels en twee peren"

write out time

const numtowords = require('num-to-words-nl')

console.log(numtowords.time_to_words("12:00")) // Outputs: "twaalf uur"

Supported Currencies

• USD (United States Dollar)
• EUR (Euro)

API Documentation

int_to_words(n, params)

Converts an integer n into its Dutch word representation.

• n: The integer to be converted.
• params: Optional object with configuration parameters (capitals for capitalizing the first letter, noWarnings to suppress warnings).

float_to_words(n, params, puntofkomma = "komma")

Converts a float n into its Dutch word representation.

• n: The float to be converted.
• params: Optional object with configuration parameters (capitals, noWarnings).
• puntofkomma: Optional string to specify the separator between integer and fractional parts. By default it is komma

num_to_currency(amount, currency = 'EUR', customCurrencyNames = null)

Converts a currency amount into its Dutch word representation.

• amount: The currency amount (float) to be converted.
• currency: Optional string specifying the currency (default is 'EUR' for Euro).
• customCurrencyNames: Optional object providing custom currency names.

replace_num_to_words(text)

Replaces all numeric substrings in text with their Dutch word equivalents.

• text: The input text containing numbers to be replaced.

time_to_words(time)

Writes out the time into its Dutch word representation

• time: The time in hh:mm format. Example: 12:10 -> tien over twaalf.

Run tests

npm run test

Run CLI command

npm nl-numtowords-cli <number>

example:

npm exec nl-numtowords-cli 99 # negenennegentig

if globally installed (npm install num-to-word-nl -g)

nl-numtowords-cli 99 # negenennegentig

Contributing

You are welcome to submit a pull request for additional languages or errors I made in the current functions

License

This project is licensed under the MIT License - see the LICENSE file for details.