What are the methods of assigning values ​​to one-dimensional arrays in Java?

1. Declaration of assignment

Assignment is done when declaring.

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

2. Declare first, then create, then assign value

In fact, before assignment, the array will be assigned a default value. This value will vary depending on the data type. , will be different. For reference type arrays, null is generally assigned, such as String type arrays. For int type arrays, 0 is generally assigned, and floating point arrays are assigned 0.0. The code is as follows (the difference here That is, the array will be assigned a default value after it is created, but for local variables, there is no default value)

Note: In Java, the array subscript starts from 0 and increases until the array length is -1. The count of length starts from 1.

public class Demo {
 
public static void main(String[] args) {
int[] num=new int[5];//提升性能
int length=num.length;
for(int i=0;i<length;i++) {
num[i]=i+90;
System.out.println(num[i]);
}  
}
}

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