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Accepted
Emy
Asked: 2022-10-21 17:42:17 +0800 CST 2022-10-21 17:42:17 +0800 CST

Using break inside an if and for loop doesn't work in java

  • 772

I'm trying to check if a vowel exists in a string, if found I use break; to break the loop and return a message, but it doesn't work.

        String palabra="manzana";
        String[] arrayPalabra=palabra.split("");
        String[] vocales=new String[]{"a","e","i","o","u"};
        var listVocals=Arrays.asList(vocales);
        for (int i=0;i<arrayPalabra.length;i++) {
            boolean existe = listVocals.contains(arrayPalabra[i]);
            if(existe==true){
                System.out.println("Existe vocal");
                break;
            }else{
                System.out.println("NO Existe vocal"); 
                break;
            }
        }
java

2 Answers

  1. Best Answer

    Since you only need to know if your word contains a vowel or not, you would need your loop to execute first and then evaluate the conditionals, since if you use the breakin both conditionals if | elseyour loop breaks .

        var listVocals=Arrays.asList(vocales);
    boolean existe=false;
    for (String arrayDatos : arrayPalabra) {
        existe = listVocals.contains(arrayDatos);
     }
     if(existe){
            System.out.println("Existe vocal");  
        }else{
            System.out.println("NO Existe vocal"); 
            
        }

    // using break only when a vowel is returned in the word

    for(String arrayDatos : arrayPalabra){
            existe = listVocals.contains(arrayDatos);
            if(existe){
               System.out.println("tiene vocal");
               break;
            }

        } if(!existe){System.out.println("no tiene vocal");}
    • 1

  2. You could initialize a listVocalsas a list of type String. Also (logically), your condition ifshould be outside the loop for, otherwise it would return an trueor falsefor each character in the string that returns the .split(), and what we need is just one trueor false.

    public static void main(String[] args) {
    String palabra = "mzn";
    String[] arrayPalabra = palabra.split("");
    String[] vocales = new String[]{"a", "e", "i", "o", "u"};
    
    List<String> listVocals = Arrays.asList(vocales);
    boolean existe = false;
    
    for (String arrayDatos : arrayPalabra) {
        existe = listVocals.contains(arrayDatos);
    }
    if (existe == true) {
        System.out.println("Existe vocal");
        } else {
        System.out.println("NO Existe vocal");
    }
}
    • 0