package fabs;
import java.util.Scanner;
public class Fabs {
  public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);
    double num;         //定义任意实数
    System.out.println("请输入一个任意实数！");
    num=sc.nextDouble();
    if(num==0 ||num > 0)
    { 
      System.out.println("该数的绝对值为："+num);

    }
    else if(num<0)
    {
      num=-num;
      System.out.println("该数的绝对值为："+num);
    }
  }
}