Check if an argument is a valid ISIN string

Validates ISIN (International Securities Identification Number) format including Luhn check digit verification.

Usage

is_isin(x)

Arguments

x

(any)
Object to check.

Value

TRUE if x is a valid ISIN string, FALSE otherwise.

References

https://en.wikipedia.org/wiki/International_Securities_Identification_Number

Examples

is_isin("US0378331005")
#> [1] TRUE