POSline TPC7030, Programming Manual

Page: 25 / 131

3.4 Commands for string processing
LEN
Purpose
Κ
To return the length of a string.
Syntax
Κ A% = LEN(S$)
Example
Κ
Str$="ABCDEFGHIJK"
L% = LEN(Str$)
PRINT "Len. = ",L%
Description
Κ A% is an integer variable to be assigned to the result.
S$ may be a string variable, string expression, or string
constant.
INSTR
Purpose
Κ
To search if one string exists inside antoher one.
Syntax
Κ A% = INSTR([N%,] S1$, S2$)
Example
Κ
Str$="ABCGEFGHIJK"
G$="GH"
PRINT INSTR(5,Str$, G$)
PRINT INSTR(3, Str$, "CGE")
Description
Κ A% is an integer variable to be assigned to the result.
N% is a numeric expression. Optional offset N% sets the
position for starting the search.
S1$, S2$ may be a string variable, string expression, or string
constant.
If
S2$ is found in S1$ , it returns the position of the first
occurrence of S2$ in S1$ , from the starting point.
If N% is larger than the length of S1$ or if S1$ is null, of if
S2$ cannot be found,it return 0.
If S2$ is null,it return N% (or 1 if N% is not specified).
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Programming Manual Ver. 1.00 24/131