Math.log( ) In JavaScript

The Math.log() function in JavaScript is used to return the natural logarithm (base e) of a number. The JavaScript Math.log() function is equivalent to ln(x) in mathematics.
If the value of x is negative, then math.log() function return NaN.
log() is a static method of Math, therefore, it is always used as Math.log(), rather than as a method of a Math object created.

Syntax:

Math.log(value)

Parameters: this function accepts a single parameter value which is a number whose natural logarithm you want to find.

Returns: The Math.log() function returns the natural logarithm given number.

Examples:

When zero is passed as a parameter.

<script type="text/javascript">

document.write("Output : " + Math.log(0));

</script>
Output:
```
Output : -Infinity
```
When “-1” is passed as a parameter.

<script type="text/javascript">

document.write("Output : " + Math.log(-1));

</script>
Output:
```
Output : NaN
```
When “10” is passed as a parameter.

<script type="text/javascript">

document.write("Output : " + Math.log(10));

</script>
Output:
```
Output : 2.302585092994046
```
Calculating Math.log() with a different base.
For finding the logarithm of 8 with base 2,execute the math.log() function in the following way:

<script type="text/javascript">

document.write("Output : " + Math.log(8)/Math.log(2));

</script>
Output:
```
Output : 3
```

Supported Browsers: The browsers supported by JavaScript Math.log( ) function are listed below:

Google Chrome
Internet Explorer
Firefox
Opera
Safari

My Personal Notes

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Shubrodeep Banerjee

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