


Currency Formatting in Golang Using currency.Symbol from golang.org/x/text/currency
Using System Locale Resources
When using golang.org/x/text/currency to format currency values in Golang, it's possible to retrieve the appropriate format from the system locale by leveraging the DisplayTags and FromTag functions. The DisplayTags function provides localized names for languages, and FromTag retrieves a currency based on the language tag.
<code class="go">n := display.Tags(language.English) for _, lcode := range []string{"en_US", "pt_BR", "de", "ja", "hi"} { lang := language.MustParse(lcode) cur, _ := currency.FromTag(lang) scale, _ := currency.Cash.Rounding(cur) // fractional digits dec := number.Decimal(100000.00, number.Scale(scale)) p := message.NewPrinter(lang) p.Printf("%24v (%v): %v%v\n", n.Name(lang), cur, currency.Symbol(cur), dec) } // Output: // American English (USD): 0,000.00 // Brazilian Portuguese (BRL): R0.000,00 // German (EUR): €100.000,00 // Japanese (JPY): ¥100,000 // Hindi (INR): ₹1,00,000.00</code>
Specifying Language and ISO Codes
Alternatively, you can explicitly specify the language or ISO currency code to retrieve the correct currency format. However, you must provide the language in which to format the number:
<code class="go">// Parse ISO currency code and specify language for _, iso := range []string{"USD", "BRL", "EUR", "JPY", "INR"} { cur := currency.MustParseISO(iso) scale, _ := currency.Cash.Rounding(cur) // fractional digits dec := number.Decimal(100000.00, number.Scale(scale)) p := message.NewPrinter(language.English) p.Printf("%v: %v%v\n", cur, currency.Symbol(cur), dec) } // Output: // USD: 0,000.00 // BRL: R0,000.00 // EUR: €100,000.00 // JPY: ¥100,000 // INR: ₹100,000.00</code>
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