feat(library): add experimental string RIGHT function

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/pseudocode-lib/README.md b/pseudocode-lib/README.md
index b776d16..6a4c23c 100644
--- a/pseudocode-lib/README.md
+++ b/pseudocode-lib/README.md
@@ -20,3 +20,5 @@ INCLUDE paths are relative to the program. Adjust them when the program is elsew
 The library provides `&`, `_EXP_STRING_NUM_TO_STR` (INTEGER/REAL), `_EXP_STRING_STR_TO_NUM` (REAL), `_EXP_STRING_LENGTH` (byte length) and `_EXP_STRING_OUTPUT` (text plus newline). Numeric formatting uses `std::to_string`; parsing uses `std::stod` and requires full consumption. C++ standard exceptions print the user call line and are catchable with TRY/CATCH. The built-in STRING remains available with its existing lifetime and NUL limitations. Owning class values inside whole-record or BYVAL-array copies still have bitwise-copy limitations.
 
 `_EXP_STRING_LEFT(S : _EXP_STRING, Count : INTEGER)` returns a new `_EXP_STRING` containing up to Count bytes from the beginning. Nonpositive counts return an empty string; counts exceeding the length return the whole string. Embedded NUL bytes are preserved.
+
+`_EXP_STRING_RIGHT(S : _EXP_STRING, Count : INTEGER)` returns a new `_EXP_STRING` containing up to Count bytes from the end. Nonpositive counts return an empty string; counts exceeding the length return the whole string. Embedded NUL bytes are preserved.