— Scheme Procedure: **number->string**` n `[`radix`]

— C Function:**scm_number_to_string** (`n, radix`)

— C Function:

Return a string holding the external representation of the number

nin the givenradix. Ifnis inexact, a radix of 10 will be used.

— Scheme Procedure: **string->number**` string `[`radix`]

— C Function:**scm_string_to_number** (`string, radix`)

— C Function:

Return a number of the maximally precise representation expressed by the given

string.radixmust be an exact integer, either 2, 8, 10, or 16. If supplied,radixis a default radix that may be overridden by an explicit radix prefix instring(e.g. "#o177"). Ifradixis not supplied, then the default radix is 10. If string is not a syntactically valid notation for a number, then`string->number`

returns`#f`

.

— C Function: SCM **scm_c_locale_stringn_to_number** (`const char *string, size_t len, unsigned radix`)

As per

`string->number`

above, but taking a C string, as pointer and length. The string characters should be in the current locale encoding (`locale`

in the name refers only to that, there's no locale-dependent parsing).