Malvern Instruments Zetasizer 1000, Basic Reference Manual

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l
The use of line numbers with tests to change the order of execution.
Basic is not case sensitive. That is, you can use upper and lower case characters in any
combination. Spaces are not significant. Thus,
RectWidth = Val ( X$ )
and
RectWidth = Val ( X$ )
are equivalent.
The exception to this is that names of variables, commands, etc. may not contain spaces. You
can use
InputBox$...
Inputbox$...
inputbox$...
etc.
but
Input Box$...
will fail.
There are various standard ways to make names of variables more readable. The example uses
capital letters. You can also use the underscore character. For example MeanSize or
mean_size.
2.2 Building blocks of programs
The building blocks of Basic program statements are :
Commands
The commands cause actions such as “measure”, “print”, etc. They also provide means of
controlling the program by repeating loops, branching as the result of tests, etc.
Functions
The functions provide values for testing or printing.
Variables and numerical constants
The variables allow you to store and calculate with values from functions.
Operators
The operators are the means of adding, multiplying, etc. the variables and constants.
Expressions
Expressions are the result of evaluating combinations of variables, functions and operators. They
may often be used as options for commands.
MAN0179
Page 2.2 Zetasizer 1000/2000/3000/4000/5000/4700
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