Initializing help system before first use

IsNullVariable Method

Check whether a variable is the same as NULL_VARIABLE. The NULL_VARIABLE is used in certain places to indicate the absence of a variable. For example, when iterating over the linear terms of an expression, a term with a NULL_VARIABLE indicates a constant term in the expression.

Namespace:   Optimizer.Objects
Assembly:  xprsdn (in xprsdn.dll) Version: 44.01.01
Syntax
C# 
public static bool IsNullVariable(
	Variable v
)

Parameters

v
Type:  Optimizer.Objects.Variable
The variable to check.

Return Value

Type:  Boolean
true if v is the null variable.
Remarks
See Also
Parent Topic XpressProblem Methods

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