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MaxIntValue

function MaxIntValue(const aValues: array of Integer): Integer;

Example​

procedure ScriptEvent(var Value: variant);
begin
  Value := MaxIntValue([4, -2, 9, 9]); // 9
end;

Usage​

MaxIntValue returns the largest Integer in a non-empty open-array argument.

Parameters

NameTypeDescription
aValuesopen array of Integer, constOne or more 32-bit signed values. Inline open-array syntax such as [A, B, C] is supported.

Returns

The greatest element. Duplicate maxima do not change the result and no index is returned.

Additional Technical Info​

MaxIntValue returns the largest actual value in a non-empty open array of 32-bit Integers. It does not return the maximum representable Integer type constant; use High for a type/storage boundary.

The wrapper delegates directly to Delphi System.Math.MaxIntValue. The example is fictional and source-reviewed only.

Implementation

The Velox wrapper calls Math.MaxIntValue(aValues). The installed RTL initializes the result from Data[Low(Data)], then scans from the second through last element and replaces the result whenever it finds a larger value.

Edge cases and errors

  • An empty array is invalid. The installed RTL immediately reads Data[0] without first checking the length. That access is inside the separately compiled RTL, so the product project's range-check setting does not make the result predictably safe: an RTL build with checks can raise ERangeError; otherwise the call can read outside the empty array and return an undefined value. Never pass an empty array.
  • A single element returns itself.
  • Values remain exact 32-bit Integers; there is no floating conversion or locale behavior.
  • Evaluation/conversion of inline array element expressions occurs before the helper runs and can raise independently.

Performance and side effects

The function is pure and performs a linear O(n) scan with constant additional storage. It does not sort or mutate the input.

Related entries

  • MinIntValue returns the smallest array element.
  • High returns an index or type maximum rather than an array value maximum.

External references

Created 2026-07-15