EPPlus/FormulaParsing/Excel/Functions/Math/Rand.cs

using System;
using System.Collections.Generic;
using OfficeOpenXml.FormulaParsing.ExpressionGraph;

namespace OfficeOpenXml.FormulaParsing.Excel.Functions.Math;

public class Rand : ExcelFunction {
  private static int Seed { get; set; }

  public override CompileResult Execute(
      IEnumerable<FunctionArgument> arguments,
      ParsingContext context) {
    Seed = Seed > 50 ? 0 : Seed + 5;
    var val = new Random(System.DateTime.Now.Millisecond + Seed).NextDouble();
    return CreateResult(val, DataType.Decimal);
  }
}