15-07-08 Array

Array: Is the space to store the same type of data in memory continuously

Because you need to store large amounts of data of the same type in real-world applications, you have an array

Definition of array: data type [] array name =new data type [length];

Example: int [] a = new int [10];

data type [] array name =new data type []{value, separated by commas};

Example: int [] b = new int []{1,2,3,4,5};

Array assignment and value: use subscript to manipulate each element in the array

Assignment: array name [subscript] = value;

Value: array name [subscript];

Note: The index of an element in an array starts at 0, and the maximum subscript value is less than the length of the array 1

The benefits of arrays:

1. Define multiple spaces for storing data at once

2. Can be used in conjunction with a For loop, using the loop variable as the subscript for the data

One-dimensional arrays:

①int [] n = new int [5];     N[0] = 1;     N[1] = 2;   n[2] = 3;    n[3] = 4; N[4] = 5;

②int[] n = new int[] {1,2,3,4,5};

Two-dimensional array: int[,] a =new int [4,2];

15-07-08 Array