java.lang.StrictMath.log10() 方法返回以10為底的對數的double值。它包括了一些情況:
以下是java.lang.StrictMath.log10()方法的宣告
public static double log10(double a)
a -- 這是一個值
此方法返回以10為底的對數的值。
NA
下面的例子顯示java.lang.StrictMath.log10()方法的使用。
package com.yiibai; import java.lang.*; public class StrictMathDemo { public static void main(String[] args) { double d1 = 0.0 , d2 = 1000.0 , d3 = (1.0/0.0), d4 = 1; // returns natural logarithm (base 10) of a double value. double log10Value = StrictMath.log10(d1); System.out.println("Log " + d1 + " with base 10 = " + log10Value); // if the argument is equal to 10n for integer n, it returns n. log10Value = StrictMath.log10(d2); System.out.println("Log " + d2 + " with base 10 = " + log10Value); log10Value = StrictMath.log10(d3); System.out.println("Log " + d3 + " with base 10 = " + log10Value); log10Value = StrictMath.log10(d4); System.out.println("Log " + d4 + " with base 10 = " + log10Value); } }
讓我們來編譯和執行上面的程式,這將產生以下結果:
Log 0.0 with base 10 = -Infinity Log 1000.0 with base 10 = 3.0 Log Infinity with base 10 = Infinity Log 1.0 with base 10 = 0.0