Number's logarithm Special cases: log(+0.0) = -infinity log(-0.0) = -infinity log((anything < 0) = NaN log(+infinity) = +infinity log(-infinity) = NaN log(NaN) = NaN - Android java.lang

Android examples for java.lang:Math

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Description

Number's logarithm Special cases: log(+0.0) = -infinity log(-0.0) = -infinity log((anything < 0) = NaN log(+infinity) = +infinity log(-infinity) = NaN log(NaN) = NaN

Demo Code


//package com.java2s;

public class Main {
    /**//from www .  j a  v  a 2 s. c o  m
     * Number's logarithm <br>
     * Special cases:
     * 
     * <li>log(+0.0) = -infinity</li> <li>log(-0.0) = -infinity</li><li>
     * log((anything < 0) = NaN</li> <li>log(+infinity) = +infinity</li><li>
     * log(-infinity) = NaN</li><li>log(NaN) = NaN</li>
     * 
     * 
     * @param number
     * @return Returns the closest double approximation of the natural logarithm
     *         of the argument. The returned result is within 1 ulp (unit in the
     *         last place) of the real result.
     */
    public static float logarithm(float number) {
        return (float) Math.log(number);
    }
}

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