Java学习日报7.14

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);
}
}
}