Brightsign HD2000 BrightScript Reference Guide Bedienungsanleitung PDF herunterladen (Seite 24)

Built-in String Functions

ASC MID

CHR RIGHT

INSTR STR

INKEY STRING

LEN VAL

LEFT READASCIIFILE

ASC (string)

Returns the ASCII code (in decimal form) for the first character of the specified string. . A null-string

argument will cause an error to occur. Example:

100 PRINT ASC("A")

CHR (expression)

Performs the inverse of the ASC function: returns a one-character string whose character has the specified

ASCII, or control. Example:

PRINT CHR$(35) ‘prints a number-sign #

Using CHR$, you can assign quote-marks (normally used as string-delimiters) to strings. The ASCII code for

quotes - is 34. So A$=CHR$(34) assigns the value " to A$.

INSTR(position to start, text-to-search, substring-to-find)

Returns the position of a substring within a string. Returns 0 if the substring is not found.

The first position is 1. For example:

PRINT INSTR(1, “This is a test”, “is”)

will print 3

LEFT (string, n)

Returns the first n characters of string.

PRINT LEFT$(“Timothy”, 3) ‘ displays Tim

LEN (string)

Returns the character length of the specified string. Example:

PRINT LEN(“Timothy”) ‘ prints 7

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Brightsign HD2000 BrightScript Reference Guide Bedienungsanleitung Seite 24