convertir string a double!!

[[oscarac]]

Se me adelantaron

Código Delphi [-]
 
var
  stringValue : string;
  floatValue  : Extended;

begin
  // Set up the source string containing a number representation
  stringValue := '123.456E+002';

  // Convert it to a floating point number
  floatValue  := StrToFloat(stringValue);

  // And display the value
  ShowMessage(stringValue+' = '+FloatToStr(floatValue));
end;