AMSTRAD CPC464 User Manual page 131

A <stream expression>, refers to a <numeric expression> which identifies the screen, printer or
cassette where the text is required to ' stream' .
An ' improper argument' means that a <numeric expression>, has returned a value that is outside the
range defined as permissable in that situation or that a command parameter is invalid in some
way.and that BASIC has not. accepted this as valid input.
KEYWORDS
Please note that AMSTRAD BASIC keywords are listed here using the form:
KEYWORD
Syntax/Function
Example
Description
Associated KEYWORDS
IMPORTANT:
Keywords are either
COMMANDS : operations that are executed directly.
FUNCTIONS : operations that are invoked as arguments in an expression
Brackets
( ) are required as part of the command or function. Other types of brackets used in the KEYWORD
description are for the purposes of the description, and should not be typed as part of the line:
[] enclose optional items.
<> enclose various expressions which are described in the subsequent description.
Quotes
Only " " form part of the actual BASIC program structure. ' ' are used to emphasise or highlight
certain aspects of the description.' ' should not appear in any part of the syntax/Function or Example
entries other than within <string expression>s.
Entering
BASIC converts all keywords entered in lower case letters into UPPER CASE when a program
is LIST ed. The examples shown here use UPPER CASE, since this is how the program will appear
when LIST ed - if you enter using lower case , you will be able to spot typing errors more readily
since the mistyped keyword will still be displayed in lower case when LIST ed.
Keywords are delimited by separators, since AMSTRAD BASIC allows you to ' bury' keywords into
variable names: eg end2 and LI STCODE are acceptable as variables in AMSTRAD BASIC.