freepascal.compiler/docs/mathex/ex35.pp

Program Example35;

{ Program to demonstrate the PopnStdDev function. }

Uses Math;

Type
  TExArray = Array[1..100] of Float;
    
Var
  I : Integer;
  ExArray : TExArray; 
    
begin
  Randomize;
  for I:=1 to 100 do 
    ExArray[i]:=(Random-Random)*100;
  Writeln('Max              : ',MaxValue(ExArray):8:4);  
  Writeln('Min              : ',MinValue(ExArray):8:4);  
  Writeln('Pop. stddev.     : ',PopnStdDev(ExArray):8:4);  
  Writeln('Pop. stddev. (b) : ',PopnStdDev(@ExArray[1],100):8:4);  
end.