Local variables, Constants – Teledyne LeCroy BPT - References Manual User Manual

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CATC S

CRIPTING

ANGUAGE

1.1

HAPTER

Reference Manual

Values

will create a local variable called

Local

, which will only be visible within the

function

Function

. Additionally, it will change the value of

Global

"cat",

which will be visible to all functions. This will also change its value type from an
integer to a string.

Local Variables

Local variables are not declared. Instead, they are created as needed. Local
variables are created either by being in a function's parameter list, or simply by
being assigned a value in a function body.

Function(Parameter)
{

Local = 20;

}

This function will create a local variable

Parameter

and a local variable

Local

which has an assigned value of 20.

Constants

A constant is similar to a variable, except that its value cannot be changed. Like
variables, constant names must contain only alphanumeric characters and the un-
derscore (

) character, and they cannot begin with a number.

Constants are declared similarly to global variables using the keyword

const

const CONSTANT = 20;

They can be assigned to any value type, but will generate an error if used in the left-
hand side of an assignment statement later on. For instance,

const constant_2 = 3;

Function()
{

constant_2 = 5;

}

will generate an error.

Declaring a constant with the same name as a global, or a global with the same name
as a constant, will also generate an error. Like globals, constants can only be
declared in the file scope.