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Visual Basic .NET / Procedures

ParamArray

Learn ParamArray in Visual Basic .NET through a focused explanation, a dedicated construct-specific example, an engineering boundary, and a mastery check.

10 min read • Beginner

ParamArray is an atomic Visual Basic .NET topic inside Procedures. This lesson focuses on how the ParamArray construct is written, what it changes, and when it is the right tool.

Trace the example line by line. Identify the exact syntax for ParamArray, the input state before it runs, and the resulting value, control flow, database state, hardware behavior, or runtime effect afterward. Neighboring lessons use different constructs rather than renamed copies of this one.

Topic-specific example

vbnet-03-06-paramarray.vb
vbnet Try It Live 
Function Sum(ParamArray values() As Integer) As Integer
    Return values.Sum()
End Function
Console.WriteLine(Sum(2,4,6))
Edge case / engineering note

For ParamArray, test the boundary that belongs to this exact feature rather than a generic failure case. Check invalid or empty input, NULL/unknown state, numeric limits, transaction or exception behavior, synthesis/runtime constraints, ownership/permission rules, or backtracking/control-flow effects where they apply.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

ParamArray Mastery Check →
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Optional parameter
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Named arguments