Contents, cont'd. - Intermec

INSTR
Chapter 2 Program Instructions
Field of Application Function searching a specified string for a certain character, or sequence
of characters, and returning its position in relation to the start of the
string.
Syntax INSTR([,],)
1 2
is , optionally, the position where the search will start.
1
2
is the string to be searched.
is the character(s) for which the string will be searched.
Remarks INSTR allows you to search a string for some particular character(s) and
return the position of the character, or the first character in the sequence, as
a number of characters positions measured from the start of the string.
As an option, it is possible to specify a certain position in the string from which
the search will start. If no start position is specified, the search will start at the
beginning of the string.
The result will be zero if
- the start position value exceeds the length of the string.
- the string is empty.
- the searched combination of characters cannot be found.
Examples In this example, the string "INTERMEC_PRINTER_AB" is searched for the
character combination "AB". No start position is specified.
10 A$="INTERMEC PRINTER AB"
20 B$="AB"
30 PRINT INSTR(A$,B$)
RUN
yields:
18
In next example, the string "INTERMEC_PRINTER_AB" is searched for the
character "I" and the start position is specified as 4.
10 A$="INTERMEC PRINTER AB"
20 B$="I"
30 PRINT INSTR(4,A$,B$)
RUN
yields:
12
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