Write statements that assign random integers to the variable \(n\) in the following ranges: a) \(1 \leq n \leq 2\) b) \(1 \leq n \leq 100\) c) \(0 \leq n \leq 9\) d) \(1000 \leq n \leq 1112\) e) \(-1 \leq n \leq 1\) f) \(-3 \leq n \leq 11\)

Short Answer

Expert verified
To assign random integers to variable n, use 'n = random.randint(start, end)' where start and end are the bounds of the desired range.

Step by step solution

01

- Import Necessary Module

First, we will need to import the 'random' module, which contains functions that can generate random numbers.
02

- Generate Random Integer for Range 1 to 2

Use the 'randint' function from the 'random' module to generate a random integer for the variable n within the range 1 to 2 inclusive. The code will be 'n = random.randint(1, 2)'.
03

- Generate Random Integer for Range 1 to 100

Similarly, use the 'randint' function to generate a random integer for the variable n within the range 1 to 100 inclusive. The code will be 'n = random.randint(1, 100)'.
04

- Generate Random Integer for Range 0 to 9

Again, use the 'randint' function to generate a random integer for the variable n within the range 0 to 9 inclusive. The code will be 'n = random.randint(0, 9)'.
05

- Generate Random Integer for Range 1000 to 1112

Use the 'randint' function to generate a random integer for the variable n within the range 1000 to 1112 inclusive. The code will be 'n = random.randint(1000, 1112)'.
06

- Generate Random Integer for Range -1 to 1

Use the 'randint' function to generate a random integer for the variable n within the range -1 to 1 inclusive. The code will be 'n = random.randint(-1, 1)'.
07

- Generate Random Integer for Range -3 to 11

Lastly, use the 'randint' function to generate a random integer for the variable n within the range -3 to 11 inclusive. The code will be 'n = random.randint(-3, 11)'.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Random Module
In Java, generating random numbers is a common task that can add unpredictability or simulate randomness in applications. This is crucial in various programming scenarios, such as games, simulations, and security algorithms.

The backbone of generating random numbers in Java is the Random module, which provides several methods that can produce different kinds of random values. One of the key functions provided by this module is randint, which stands for 'random integer'.

Using the Random module is simple and involves two main steps: importing the necessary class from the package and then creating an instance of the Random class. From this instance, we can call various methods to generate random numbers, such as nextInt(int bound) for integers, nextDouble() for doubles, and so on.
Randint Function
The randint function is a part of the java.util.Random class and is a workhorse for generating random integers within a specific range. Every call to nextInt(int bound) generates a random number between 0 (inclusive) and the specified bound (exclusive).

This function ensures that with each call, any number within the specified range has an equal chance of being selected. This is known as a uniform distribution. To get a number in the range you want, like between 1 and 100, you'd adjust the bounds accordingly, often using nextInt(100) + 1, which generates numbers from 1 to 100 inclusively.
Generate Random Integers
When we generate random integers, we often need them to fit within a particular range, as specified in the exercise provided. To generate an integer within a range in Java using the Random module, you typically use the syntax random.nextInt((max - min) + 1) + min, where min is the start and max is the end of the range.

For example, to generate a random integer between -3 and 11, you would compute (11 - (-3)) + 1 to find the bound, then add -3 to shift the range to begin at -3. Thus, it would look like random.nextInt(15) - 3, where 15 is the total number of integers in the range from -3 to 11.
Programming with Java
Java's strong capabilities in dealing with randomness make it a versatile choice for programming various applications. It is a robust, object-oriented programming language used extensively in the industry.

When coding in Java, initially, programmers define the class and methods. To work with random numbers, Java programmers usually include the Random module, create an instance, and utilize the methods provided to generate random data as needed. Understanding how to generate random numbers is crucial for Java developers because it is a frequently encountered requirement. A deep understanding of how Java handles randomness can also help create more efficient and effective programs.

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Most popular questions from this chapter

The greatest common divisor \((G C D)\) of two integers is the largest integer that evenly divides each of the two numbers. Write a method gcd that returns the greatest common divisor of two integers. [Hint: You might want to use Euclid's algorithm. You can find information about it at en.wikipedia.org/wiki/Euclidean_algorithm.] Incorporate the method into an application that reads two values from the user and displays the result.

Answer each of the following questions: a) What does it mean to choose numbers "at random"? b) Why is the nextInt method of class Random useful for simulating games of chance? c) Why is it often necessary to scale or shift the values produced by a Random object? d) Why is computerized simulation of real-world situations a useful technique?

Write a method qual ityPoints that inputs a student's average and returns 4 if it's \(90-100\) 3 if \(80-89,2\) if \(70-79,1\) if \(60-69\) and 0 if lower than \(60 .\) Incorporate the method into an application that reads a value from the user and displays the result.

Write a method is Even that uses the remainder operator ( \(\%\) ) to determine whether an integer is even. The method should take an integer argument and return true if the integer is even and false otherwise. Incorporate this method into an application that inputs a sequence of integers (one at a time) and determines whether each is even or odd.

Write a method square0fasterisks that displays a solid square (the same number of rows and columns) of asterisks whose side is specified in integer parameter side. For example, if side is \(4,\) the method should display Incorporate this method into an application that reads an integer value for side from the user and outputs the asterisks with the square0fAsterisks method.

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