# Java Math Class static double log(double d) with example

Java Math Class static double log(double d) method: Here, we are going to learn about the static double log(double d) method of Math Class with its syntax and example.
Submitted by Preeti Jain, on September 04, 2019

## Math Class static double log(double d)

• This method is available in java.lang package.
• This method is used to return the logarithm of the given (base e) of the given argument.
• This is a static method so it is accessible with the class name too.
• The return type of this method is double, it returns the logarithm (base e) of the given argument.
• In this method, we pass only one parameter as an argument of double type.
• This method does not throw any exception.

Syntax:

```    public static double log(double d){
}
```

Parameter(s): It accepts a double value, whose logarithm to be found.

Return value:

The return type of this method is double, it returns the logarithm (base e).

Note:

• If we pass "NaN", it returns "NaN".
• If we pass less than 0, it returns "NaN".
• If we pass positive infinity, it returns the same value (positive infinity).
• If we pass zero (0 or -0), it returns negative infinity.

### Java program to demonstrate example of log(double d) method

```// Java program to demonstrate the example of
// log(double d) method of Math Class.

public class LogMethod {
public static void main(String[] args) {
// Here we are declaring few variables
double d1 = 7.0 / 0.0;
double d2 = 0.0;
double d3 = -0.6;
double d4 = 124.68;

// displaying values
System.out.println("d1: " + d1);
System.out.println("d2: " + d2);
System.out.println("d3: " + d3);
System.out.println("d4: " + d4);

// Here , we will get (NaN) because we are
// passing parameter whose value is less than 0(-0.6)
System.out.println("Math.log(d3): " + Math.log(d3));

// Here , we will get (infinity) because we are
// passing parameter whose value is (infinity)
System.out.println("Math.log(d1):" + Math.log(d1));

// Here , we will get (-Infinity) because we are
// passing parameter whose value is (0.0)
System.out.println("Math.log(d2) :" + Math.log(d2));

// Here , we will get (e raised to the power of the given argument)
// and we are passing parameter whose value is (1274.68)
System.out.println("Math.log(d4): " + Math.log(d4));
}
}
```

Output

```E:\Programs>javac LogMethod.java

E:\Programs>java LogMethod
d1: Infinity
d2: 0.0
d3: -0.6
d4: 124.68
Math.log(d3): NaN
Math.log(d1):Infinity
Math.log(d2) :-Infinity
Math.log(d4): 4.825750454899136
```

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