public static double log(double num)

// Java program to illustrate the
// Java.lang.StrictMath.log() Method
import java.lang.*;
 
public class Geeks {
 
public static void main(String[] args) {
 
    double num1 = 10 , num2 = 25.2 ;
     
    // It returns natural logarithm(base e)
    double log_Value = StrictMath.log(num1);
    System.out.print("Log value of " + num1 + " = " );
    System.out.println(log_Value);
 
    log_Value = StrictMath.log(num2);
    System.out.print("Log value of " + num2 + " = " );
    System.out.println(log_Value);
 
}
}

Log value of 10.0 = 2.302585092994046
Log value of 25.2 = 3.2268439945173775

// Java program to illustrate the
// Java.lang.StrictMath.log() Method
import java.lang.*;
 
public class Geeks {
 
public static void main(String[] args) {
 
    double num1 = 0 , num2 = (1.0/0.0) , num3 = 1;
     
    // It returns natural logarithm(base e)
    double log_Value = StrictMath.log(num1);
    System.out.print("Log value of " + num1 + " = " );
    System.out.println(log_Value);
     
    log_Value = StrictMath.log(num2);
    System.out.print("Log value of " + num2 + " = " );
    System.out.println(log_Value);
     
    log_Value = StrictMath.log(num3);
    System.out.print("Log value of " + num3 + " = " );
    System.out.println(log_Value);
 
}
}

Log value of 0.0 = -Infinity
Log value of Infinity = Infinity
Log value of 1.0 = 0.0