Java学习知识点要求(21)
Java学习知识点要求(21)2、math类的常用方法
属性
public final static double E;// 数学常量e
public final static double PI;// 圆周率常量
方法(均为静态方法)
public static int abs(int i);
public static double sin(doublea);
public static double log(doublea);
public static double max(doublea, doubleb);
public static double pow(doublea, doubleb);
public static double random();// 产生0~1之间伪随机数
public static double exp(double a);
public static int round(float a);
public static double sqrt(double a);
例:
System.out.println(Math.E); 2.718281828..
System.out.println(Math.PI); 3.14159265…
System.out.println(Math.pow( 2,3)); 8.0
System.out.println(Math.round(99.6)); 100
System.out.println(Math.abs(- 8.09)); 8.09
页:
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