Question

Look at the following statements: Int [1] numbers \(1=(1,3,6,9)\) Int \([1 \text { number } 32=\\{2,4,6,8)\) Int results Write a statement that multiplies element 0 of the nunbers1 array by clement 3 of the numbers 2 array and assigns the result to the result variable.

Short answer

Question: Write a statement that multiplies element 0 of the numbers1 array and element 3 of the numbers2 array, and assign the result to a variable called result. Answer: result = numbers1[0] * numbers2[3]

Step-by-step solution

Identify the elements to be multiplied

Element 0 of the numbers1 array is 1 and element 3 of the numbers2 array is 8. We will multiply these two elements together.

Multiply the elements

We will multiply 1 (element 0 of numbers1) by 8 (element 3 of numbers2) to get the result.

Assign the result to the result variable

Create a new variable called result and assign the multiplication result obtained in step 2 to it. The statement that performs step 2 and step 3 together is: result = numbers1[0] * numbers2[3]

Key concepts

Java Programming

Java programming is a process of designing, writing, and testing computer programs in the Java programming language. Java, developed by Sun Microsystems in the mid-1990s, is known for its portability across different platforms, which means that Java programs can run on any device that has the Java Virtual Machine (JVM) installed. The language is designed to be object-oriented, which facilitates data manipulation and program modularization.

In our context, we're dealing with numerical data handling and array management, specifically multiplying numerical values and storing the results. Java provides a robust structure for these tasks, utilizing syntax and operations that are straightforward and readable, a key point for both beginners and professional developers.

Arrays in Java

Arrays in Java are a fundamental data structure that store a fixed-size sequential collection of elements of the same type. They are a powerful concept used to organize data for easy access and manipulation. To declare an array in Java, you specify the data type of its elements and the size of the array. For instance, int[] numbers1 = {1, 3, 6, 9}; declares an array of integers.

In array processing, it's crucial to understand indexing, which starts from 0. So, the 'first' element is actually accessed with numbers1[0]. The flexibility that arrays provide in Java is pivotal in handling large data sets where repetitive operations, such as arithmetic tasks, can be automated through loops.

Basic Arithmetic Operations in Java

Basic arithmetic operations in Java are performed using the standard arithmetic operators such as addition (+), subtraction (-), multiplication (*), and division (/). For example, multiplying two numbers involves the '*' operator. Java follows the arithmetic rules of precedence, which determine the order in which operations are performed.

When multiplying elements from arrays, you first access the elements using index notation and then use the '*' operator to compute the product. For example, result = numbers1[0] * numbers2[3]; retrieves and multiplies the first element of numbers1 with the fourth element of numbers2 and stores the result.

Variable Assignment in Java

Variable assignment in Java is the act of storing a value in a variable. Variables are placeholders for storing data values. In Java, you must declare a variable with a specific data type before you can use it. The assignment operator '=' is used to assign values to variables.

Continuous variable assignments and updates are a common practice in Java, as data needs be dynamic and changeable. For example, when performing an operation on array elements, such as multiplication, the result is often stored in a new variable, like int result = numbers1[0] * numbers2[3]; This creates an integer variable named 'result' and assigns it the product of the multiplication operation.