Case: Find (including method)

Case: Find

//需求：已知一个数组arr = {19，28，37，46，50} ;键盘输入一个数据，查找该数据在数组中的索引，并在控制台输出找到的索引值
import java.util.Scanner;
public class HelloWorld{
    
    
    public static void main(String[] args){
    
    
        Scanner sc =new Scanner(System.in);
        System.out.println("请输入要查找的数据");
        int number = sc.nextInt();
        int arr[] = {
    
    19,28,37,46,50};
        int index = -1;
        for(int a = 0; a<arr.length ; a++){
    
    
            if(number == arr[a]){
    
    
                index = a;
                break;
            }
        }
        System.out.println(index);
    }
}

import java.util.Scanner;

public class HelloWorld {
    
    
    public static void main(String[] args) {
    
    
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入要查找的数据");
        int number = sc.nextInt();
        int arr[] = {
    
    19, 28, 37, 46, 50};
        int index = Index(arr, number);
        System.out.println(index);
    }

    public static int Index(int arr[], int number) {
    
    
        int index = -1;
        for (int a = 0; a < arr.length; a++)
            if (number == arr[a]) {
    
    
                index = a;
                break;
            }
        return index;
    }


}