Passing a variable between functions [Silly Question]

Hey, I am trying to write a program (who wouldve guessed) and I have the following problem. I set a variable in one function, but when I access it from another one, it is "undefined". How can I pass the variable, so both the functions see it? I thought the "public" class when defining a function should take care of that, but I was obviously wrong. Please help? (Code following...)
public function dalsi_slovicko():void {
               var pocet_slovicek = slovnikXML.slovicka.elements("*").length();
               var cislo_slovicka = randomNumber(0, pocet_slovicek);
               var slovicko_1 = ask(cislo_slovicka, "en");
               var slovicko_2 = ask(cislo_slovicka, "cs");
               slovicko1.text = slovicko_1;
private function kontrola() : void {
          if (nazor.text == slovicko_2) {
                dalsi_slovicko()
          else {
               Alert.show("Špatně!! \n Slovicko_2 bylo:" + slovicko_2);
Thanks...

create the variable outside the functions so it is accessible for all the functions.
private var slovicko_2;
public function dalsi_slovicko():void {
            var pocet_slovicek = slovnikXML.slovicka.elements("*").length();
             var cislo_slovicka = randomNumber(0, pocet_slovicek);
             var slovicko_1 = ask(cislo_slovicka, "en");
             slovicko_2 = ask(cislo_slovicka, "cs");
             slovicko1.text = slovicko_1;
private function kontrola() : void {
          if (nazor.text == slovicko_2) {
               dalsi_slovicko()
          else {
              Alert.show("Špatně!! \n Slovicko_2 bylo:" + slovicko_2);
Also when you declare variables, set appropriate datatypes

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Passing a variable between functions [Silly Question]

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