Metrologic IS1000 Series Betriebsanweisung PDF herunterladen (Seite 40)

CipherLab BASIC Compiler

User's Guide

"X$", "Y$" may be a string variable, string expression, or string constant.

If Y$ is found in X$, INSTR returns the position of the first occurrence of Y$ in X$,

from the starting point.

If N is larger than the length of X$ or if X$ is null, of if Y$ cannot be found, INSTR

returns 0.

If Y$ is null, INSTR returns N (or 1 if N is not specified).

Example

String1$ = "11025John Thomas, Accounting Manager"

String2$ = ","

EmployeeName$ = MID$(String1$, 6, INSTR(String1$, String2$) - 6)

' the employee's name starts at the sixth character

5.4.5 Retrieving Part of Strings

Several commands are provided to take strings apart by returning pieces of a string, from

the left side, or the right side, or the middle of the target string.

LEFT$

Purpose

To retrieve a given number of characters from the left side of the target string.

Syntax

A$ = LEFT$(X$, N%)

Remarks

"A$" is a string variable to be assigned to the result.

"N%" is a numeric expression in the range of 0 to 255.

"X$" may be a string variable, string expression, or string constant.

If N is larger than the length of X$, the entire string (X$) is returned.

If N is zero, the null string (with lenght 0) is returned.

Example

String1$ = "11025John Thomas, Accounting Manager"

EmployeeID$ = LEFT$(String1$, 5)

MID$

Purpose

To retrieve a given number of characters from anywhere of the target string.

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 197 198

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Metrologic IS1000 Series Betriebsanweisung Seite 40