\(\text{FileReadByte}\)¶
You can use the the \(\text{FileReadByte}\) function to read a single byte of data from a file.
You can use the \filereadbyte
backslash command to insert this function.
The following variants of this function are available:
\(\text{tuple } \text{FileReadByte} \left ( \text{<file number>} \right )\)
The \(\text{<file number>}\) parameter is an integer value returned by one of the \(\text{FileOpen}\ldots\) functions. The returned tuple will contain two entries:
An integer holding the received byte. The value will be over the range \([0, 255]\). The value -1 will be reported on error.
A boolean holding
true
on success orfalse
on error.
The Figure 137 shows how you can use the \(\text{FileReadByte}\) function.