> For the complete documentation index, see [llms.txt](https://educacion.gitbook.io/programacion/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://educacion.gitbook.io/programacion/exercicios-java/ud2-solucions/bucles/exercicios-de-bucles-anidados.md).

# Exercicios de bucles anidados

**Todos os exercicios de esta sección deben de ser resoltos mediante bucles anidados**

1. Escribe un programa que debuxe un rectangulo con \* coas dimensións de base e altura que o usuario escriba por pantalla. Exemplo base = 10 e altura = 5

<figure><img src="/files/3waBtjnpphuumdIEGN9i" alt=""><figcaption></figcaption></figure>

```java
public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        // --- RECTÁNGULO RELLENO ---
        System.out.print("Introduce la base: ");
        int base = sc.nextInt();
        System.out.print("Introduce la altura: ");
        int altura = sc.nextInt();

        for (int i = 0; i < altura; i++) {
            for (int j = 0; j < base; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
```

2. Igual que o anterior, pero co interior baleiro. Exemplo base = 10 e altura = 5

<figure><img src="/files/kxkzMWtqNecamXpYt3Ry" alt=""><figcaption></figcaption></figure>

```java
public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Introduce la base: ");
        int base = sc.nextInt();
        System.out.print("Introduce la altura: ");
        int altura = sc.nextInt();

        for (int i = 0; i < altura; i++) {
            for (int j = 0; j < base; j++) {
                // Bordes: primera y última fila o primera y última columna
                if (i == 0 || i == altura - 1 || j == 0 || j == base - 1)
                    System.out.print("*");
                else
                    System.out.print(" ");
            }
            System.out.println();
        }
    }
```

3. Escribe un programa que escriba un triángulo rectángulo en función da altura que introducira o usuario. Exemplo altura = 5

<figure><img src="/files/W66ZzGfLJe2IpwmnXIEs" alt=""><figcaption></figcaption></figure>

```java
public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Introduce la altura: ");
        int altura = sc.nextInt();

        for (int i = 1; i <= altura; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
```

4. Escribe un programa que escriba un triángulo rectángulo co interior baleiro en función da altura que introducirá o usuario. Exemplo altura = 5

<figure><img src="/files/tsdZHY753U0AsJAYYStz" alt=""><figcaption></figcaption></figure>

```java
public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Introduce la altura: ");
        int altura = sc.nextInt();

        for (int i = 1; i <= altura; i++) {
            for (int j = 1; j <= i; j++) {
                // Bordes: primera columna, diagonal o última fila
                if (j == 1 || j == i || i == altura)
                    System.out.print("*");
                else
                    System.out.print(" ");
            }
            System.out.println();
        }
    }
```


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