Handle Bangla Digits

Overview

The digit conversion utilities provide seamless conversion between Bangla (Bengali) digits (০-৯) and Latin (Arabic) digits (0-9). These functions are essential for applications that need to handle multilingual numeric representations, particularly in Bengali-language interfaces.

banglaToDigit

Converts Bangla digits to Latin digits with flexible output options.

Function Signature

function banglaToDigit<Force extends boolean = true>(bnDigit: string, forceNumber?: Force): BnDigitResult<Force>

Parameters

bnDigit (string): A string containing Bangla digits (০-৯).
forceNumber (Force):
- true (default): Returns a number (strips non-digit characters).
- false: Returns a string (preserves non-digit characters).

Return Value

When forceNumber = true: number (or 0 or NaN if no digits found).
When forceNumber = false: string.

Behavior

Input	`forceNumber = true`	`forceNumber = false`
Contains only Bangla digits	Returns converted number	Returns converted string
Contains mixed characters	Returns number (digits only)	Returns string with converted digits
Empty string	Returns `NaN`	Returns empty string
No digits in string	Returns `0` or `NaN`	Returns the input string

Examples

playground.ts

Use Cases

Parsing numeric input from Bengali users.
Converting database values stored in Bangla digits to numbers for calculations.
Processing multilingual forms that accept Bangla numbers.
Localization utilities for Bengali applications.

digitToBangla

Converts Latin digits to Bangla digits with optional non-digit preservation.

Function Signature

function digitToBangla(digit: number | string, preserveNonDigit?: boolean): string

Parameters

digit (number | string): A number or string containing Latin digits (0-9).
preserveNonDigit (boolean):
- true (default): Preserves non-digit characters in output.
- false: Strips non-numeric characters from output.

Return Value

string: Converted Bangla digit string (or empty string for invalid input).

Behavior

Input	`preserveNonDigit = true`	`preserveNonDigit = false`
Number	Returns Bangla digits	Returns Bangla digits
String with only digits	Returns Bangla digits	Returns Bangla digits
String with mixed characters	Converts digits, preserves others	Converts digits, strips others
Empty string	Returns empty string	Returns empty string
Non-numeric string	Returns original string	Returns empty string

Examples

playground.ts

Use Cases

Displaying numbers in Bengali interfaces.
Formatting prices, quantities, and measurements in Bengali.
Generating multilingual receipts and invoices.
Localizing numeric data for Bengali users.

Type Definitions

BanglaDigit

type BanglaDigit = '০' | '১' | '২' | '৩' | '৪' | '৫' | '৬' | '৭' | '৮' | '৯';

BnDigitResult

type BnDigitResult<Force extends boolean> = Force extends true ? number : string;

Best Practices

Use banglaToDigit() with forceNumber = true when you need to perform calculations.
Use banglaToDigit() with forceNumber = false when you need to preserve text formatting.
Use digitToBangla() with preserveNonDigit = true for displaying formatted text.
Use digitToBangla() with preserveNonDigit = false for generating clean numeric strings.
Always validate input before conversion to handle edge cases.

isNumericString() - Check if a string contains only digits
isNonEmptyString() - Check if a string is not empty

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