JavaScript Math.log2()

log2() Syntax

The syntax of log2() is:

Math.log2(x)

Here, log2() is a static method. Hence, we need to access the method using the class name, Math.

log2() Parameters

The log2() method takes in:

• x - a number

log2() Return Values

The log2() method returns:

• the base 2 logarithm of the given number.
• NaN for negative numbers and non-numeric arguments.

Example 1: JavaScript Math.log2()

Output

0
3

In the above example,

• Math.log2(1) - computes the base 2 log value of 1
• Math.log2(8) - computes the base 2 log value of 8

Example 2: log2() With 0

In the above example, we have used the log2() method to compute the base 2 log value of 0.

The output -Infinity indicates that the base 2 log value of 0 is negative infinity.

Example 3: log2() With Negative Values

In the above example, we have used the log2() method to compute the base 2 log value of a negative number.

The output NaN stands for Not a Number. We get this result because the base 2 log value of negative numbers is undefined.

Recommended Readings:

• Math.log()
• Math.log10()