Lexical - F$EXTRACT

Use to extract substrings.

$ vbl = F$EXTRACT( -

offset,- ! Zero relative!

length,-

string )

Note:

The offset is “zero-relative”; i.e., starts at zero(0).

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Earlier in this session, we looked at substring replacements. The F$EXTRACT() lexical function allows substring extraction.

The original string is left unchanged; only the contents of the requested substring are returned.

Note that the offset is “zero-relative”. The first character in a string has an offset of zero(0). The offset of the last character in a string is equal to the length of the string minus one(1) .