Currency
Currency is a system and unit of money used to express monetary value, facilitate exchange, and denominate financial amounts.
Learn Go with Pocket-Sized Projects
A currency is a monetary system whose units and denomination rules determine how amounts are represented and valued.
- How it is used
- Identifies source and target monetary units and sets valid amount and conversion-output precision.
- How deep it goes
- Defines a private-field Go value object, implements code parsing and precision cases, and checks amounts; stops short of complete currency-code validation.
- Examples
- Uses EUR and USD CLI flags, a rejected 19.8875 CAD amount, and parser tests for currencies with different precisions.
- What you can do after
- Build it from scratch: parse currency codes, reject amounts with excessive precision, and use target precision when converting.
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Investing for Programmers
A currency is a medium of exchange issued or recognized by a government or monetary authority and used to denominate value.
- How it is used
- Standardizes mixed-currency holdings so portfolio values, yields, and gains can be summed in one target currency.
- How deep it goes
- Defines currency briefly and works through exchange mapping, conversion, and aggregation, stopping short of detailed foreign-exchange mechanics.
- Examples
- Uses Microsoft and BMW shares, exchange mappings, converted price columns, and a USD portfolio worksheet.
- What you can do after
- Operate/configure a portfolio monitor that converts asset values and aggregates positions in a chosen currency.
Related concepts
- currency conversionused by · Currency conversion is the calculation of an equivalent monetary amount in one currency from an amount in another using an applicable exchange rate.
- account balanceconfigures · An account balance is the recorded amount of money or funds associated with a financial account.
- Stringerimplements · fmt.Stringer is a Go standard-library interface implemented by a type with a parameterless String method returning a textual representation.
- default valueconfigured by · A default value is a predefined or automatically supplied value used when an expected input, argument, field, or configuration setting is omitted or unspecified.
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