What are the methods for array initialization and assignment?

The methods of array initialization and assignment are: sequential initialization: use curly braces to specify the value of each element. for/while loop: traverse the array and assign values ​​in order. Factory method: Initialize an array using a function provided by the programming language (such as Java's Arrays.fill()).

Various ways to initialize and assign values ​​to arrays

An array is a collection of related elements used to store the same type of data. In programming, arrays can be initialized and assigned values ​​in a variety of ways. This article will introduce some of the most commonly used methods.

Initialization

Array initialization refers to the process of assigning default values ​​or specific values ​​to the elements of an array. You can initialize the array while declaring it. The format is as follows:

数据类型 数组名[数组大小] = {元素列表}

Example:

# 初始化一个有 5 个整数元素的数组
numbers = [1, 2, 3, 4, 5]

Assignment

Array assignment refers to assigning values given to a specific element in the array. You can use the subscript operator [] to access and set the value of an array element.

数组名[下标] = 值

Example:

# 将数组的第一个元素设置为 10
numbers[0] = 10

Summary of common methods

1. Sequential initialization

This is the simplest and most direct method. Each element is assigned a value in sequence, as follows:

int[] arr = {1, 2, 3, 4, 5};

2. for/while loop

Using a loop can assign values ​​to the array more flexibly. For example, the following code uses a for loop to set each element in the array to its index:

int[] arr = new int[5];
for (int i = 0; i < arr.length; i++) {
  arr[i] = i;
}

3. Factory Method

Some programming languages ​​provide factories method to initialize an array more easily. For example, the Java language's Arrays.fill() method can set all elements in the array to specified values:

int[] arr = new int[5];
Arrays.fill(arr, 10);

Practical case

Array initialization and Application of assignment

# 创建一个包含学生成绩的数组
grades = [90, 85, 95, 75, 80]

# 查找最高成绩
highest_grade = max(grades)

# 输出最高成绩
print("最高成绩：", highest_grade)

By using the techniques of array initialization and assignment, we can easily process and manipulate data to solve various programming problems.

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