Practice Exercises Java - Learn to program performing exercises with Java

Practice Exercises Java

Learn to program performing exercises with Java

12 Lessons Java with the Solutions - 228 Exercises Java with the solutions
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Search in array - Practice Exercises Java

Lesson 4:

Structures and Strings

Exercise 4.2:

Search in array


Create a program that says if a data belongs in a list that was previously created.

The steps to take are:
- Ask the user how many data will he enter.
- Reserve space for that amount of numbers (floating point).
- Request the data to the user
- Later, repeat:
* Ask the user for a number (execution ends when he enters "end" instead of a number).
* Say if that number is listed or not.

Must be done in pairs. but you must provide a single source file, containing the names of both programmers in a comment.

Source Code:

import java.util.*;
public class Main
	public static void main(String[] args)
		System.out.print("Cuantos datos reservo: ");
		int repeticiones = Integer.parseInt(new Scanner(;
		float numero;
		float[] listaNumeros = new float[repeticiones];

		for (int i = 1; i <= repeticiones; i++)
			System.out.printf("Dime numero " + i + "para guardar en la lista: ");
			listaNumeros[i] = Float.parseFloat(new Scanner(;

		System.out.print("Que numero comprueba en la lista? ");
		numero = Float.parseFloat(new Scanner(;

		while (!new Scanner("end"))
			for (int i = 1; i <= repeticiones; i++)
				if (listaNumeros[i] == numero)
					System.out.printf("El número " + numero + "existe en la lista" + "\r\n");
Exercisey 4.2

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