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Diffstat (limited to 'tests/library/exp-string/notes.md')
| -rw-r--r-- | tests/library/exp-string/notes.md | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tests/library/exp-string/notes.md b/tests/library/exp-string/notes.md index f360410..7eddda1 100644 --- a/tests/library/exp-string/notes.md +++ b/tests/library/exp-string/notes.md @@ -17,3 +17,5 @@ LCASE converts AbC@19 to abc@19 without modifying the source. Its CHAR overload UCASE converts AbC@19 to ABC@19 without modifying the source. Its CHAR overload returns CHAR H for h or H and preserves @, as in guide section 5.5. Empty length stays zero; two leading NULs survive conversion and letters after them still become ABC. ASC returns 65 for CHAR A and the first byte of ABCDEFGH, zero for empty strings or NUL, and 255 for a byte with all eight bits set. These byte-code functions are compiler/library extensions. + +CHR codes 65 and 90 concatenate to AZ; converting A to a code and back preserves 65. Code zero produces one retained NUL byte. Taking the low eight bits gives 65 for 321 and 255 for -1. |