x--使if无限循环

Question

我想做一些东西，如果我键入“1”，数字将是升序(x++)，如果我键入“2”，它将是降序。X++工作得很好，但如果我使用x--，它将无限循环

public static void main(String[] args) {
    Scanner scan = new Scanner (System.in);
    

    System.out.print("Enter starting loop:");
    int start = scan.nextInt();
    
    System.out.print("Enter ending loop:");
    int end = scan.nextInt();
    
    System.out.print("Choose Order:");
    int n = scan.nextInt();
    if(n==1){
    for (int x=start;x<=end;x--){
        System.out.print(x + "\t");
    
    
        }
    {
        
    }
        
        
    }
    }}

Answer 1

对于第二个循环，将其更改为x>=end而不是当前的x<=end。基本上，您必须创建两个for循环：

public static void main(String[] args) {
Scanner scan = new Scanner (System.in);


System.out.print("Enter starting loop:");
int start = scan.nextInt();

System.out.print("Enter ending loop:");
int end = scan.nextInt();

System.out.print("Choose Order: ");
int n = scan.nextInt();


  if(n==1)
    {
    for (int x=end;x>=start;x--){  //If they want to go from end to 0
        System.out.print(x + "\t");
        }
else
{
for (int x=start;x<=end;x++){  //So when they want it to go from 0 to end
        System.out.print(x + "\t");
        }