Specifications

557
Appendices
Functions
BCC$
Returns a block check character (BCC) of a data
block.
EOF
Tests whether the end of a device I/O file has been
reached.
ETX$
Modifies the value of a terminator (ETX) for the
BHT-protocol; also returns the current value of a
terminator.
INPUT$
Returns a specified number of characters read
from the keyboard or from a device file.
LOC
Returns the current position within a specified file.
LOF
Returns the length of a specified file.
SOH$
Modifies the value of a header (SOH) for the BHT-
protocol; also returns the current value of a header.
STX$
Modifies the value of a header (STX) for the BHT-
protocol; also returns the current value of a header.
Commenting a program
Statements
REM
Declares the rest of a program line to be remarks
or comments.
Manipulating numeric data
Functions
ABS
Returns the absolute value of a numeric expres-
sion.
INT
Returns the largest whole number less than or
equal to the value of a given numeric expression.