Various country's "currency decimal places width" in the iPhone-SDK

Question

I read about NSLocaleCurrencySymbol, but where would I find the variable used to determine the "number of decimal places" used in a country's currency?

I.E. In the USA, it's common to see dollar amounts written with 2 decimal places: $1.23

What about many other countries?

Answer 1

There are a number of other countries that display a different number of decimal places. 2 is the majority, 0 (no cents in their currency, e.g., Japan) is the largest minority, 3 is used in just a few. No other number that I know off. When exchange rates are quoted, more decimals are typically used. The currencies with 0 and 3 that I'm aware of are shown below.

The ISO currency codes can be found at: http://www.iso.org/iso/support/currency_codes_list-1.htm http://en.wikipedia.org/wiki/ISO_4217 or http://www.currency-iso.org/en/home/tables/table-a1.html.

ISO Code           Currency Decimal places  ADP Andoran Peseta 0 AFA Afghani Afghani 0 BEF Belgian franc 0 BHD Bahraini dinar 3 BIF Burundi franc 0 BYB Belorussian rubel (old) 0 BYR Belorussian rubel (new) 0  CLP Chilean peso 0 COP Colombian peso 0 DJF Djibouti franc 0 ECS Ecuadorian sucre 0 ESP Spanish peseta 0 GNF Guinea franc 0 GRD Greek drachma 0 HUF Hungarian forint 0 IDR Indonesian rupiah 0 IQD Iraqui dinar 3 ITL Italian lira 0 JOD Jordan dinar 3 JPY Japanese yen 0 KMF Comoros franc 0 KRW South Korean won 0 KWD Kuwaiti dinar 3 LAK Laos new kip 0 LUF Luxembourg franc 0 LYD Libyan dinar 3 MGF Madagascan franc 0 MZM Mozambique metical 0 OMR Omani rial 3 PTE Portugese escudo 0 PYG Paraguay guarani 0 ROL Roumanian Lei 0 RWF Rwanda franc 0 TJR Tadzhikistani rubel 0 TMM Turkmenistani manat 0 TND Tunesian dinar 3 TPE Timor escudo 0 TRL Turkish lira 0 TWD New Taiwan dollar 0 UGX Uganda shilling 0 VND Vietnamese dong 0 VUV Vanuata vatu 0 XAF CFA Franc BEAC 0 XOF CFA Franc BCEAO 0 XPF CFP Franc 0 

Answer 2

In iOS 6 (and possibly earlier) you can find out the number of digits after the decimal place of a currency from the minimumFractionDigits property of an NSNumberFormatter set to the correct locale:

 void (^currency_test)(NSString *) = ^(NSString *locale) {     NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];     [formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:locale]];     [formatter setNumberStyle:NSNumberFormatterCurrencyStyle];     NSLog(@"%@: %@ (minimumFractionDigits = %d)", locale, [formatter stringFromNumber:@(1000)], [formatter minimumFractionDigits]); };  currency_test(@"en_US"); currency_test(@"nl_NL"); currency_test(@"de_DE"); currency_test(@"fr_FR"); currency_test(@"jp_JP"); currency_test(@"ar_JO");  en_US: $1,000.00 (minimumFractionDigits = 2) nl_NL: € 1.000,00 (minimumFractionDigits = 2) de_DE: 1.000,00 € (minimumFractionDigits = 2) jp_JP: ¥ 1000 (minimumFractionDigits = 0) ar_JO: ١٠٠٠٫٠٠٠ د.أ.‏ (minimumFractionDigits = 3) 

Note that you must call [formatter setNumberStyle:NSNumberFormatterCurrencyStyle] before the minimumFractionDigits property is populated with the correct value (that one only took me half an hour to work out!)