java if，

java if，

import java.util.*;
public class t4{
	public	static	void main(String[] args){
		Scanner in=new Scanner(System.in);
		System.out.println("input a number:");
		int num=in.nextInt();
		if(num>1)
			System.out.println("+");
		else
			System.out.println("-");
	}
}