JavaScript - Math.log2() Method
The JavaScript Math.log2() method returns the base-2 logarithm of a given number.
Syntax
Math.log2(x)
Parameters
x |
Specify the number. |
Return Value
Returns the base-2 logarithm of a given number.
If the x is negative, it returns NaN.
If the x is 0, it returns -Infinity.
Example:
In the example below, Math.log2() method is used to calculate the base-2 logarithm of a given number.
var txt; txt = "Math.log2(1) = " + Math.log2(1) + "<br>"; txt = txt + "Math.log2(2) = " + Math.log2(2) + "<br>"; txt = txt + "Math.log2(10) = " + Math.log2(10) + "<br>"; txt = txt + "Math.log2(0) = " + Math.log2(0) + "<br>"; txt = txt + "Math.log2(-1) = " + Math.log2(-1) + "<br>";
The output (value of txt) after running above script will be:
Math.log2(1) = 0 Math.log2(2) = 1 Math.log2(10) = 3.321928094887362 Math.log2(0) = -Infinity Math.log2(-1) = NaN
❮ JavaScript - Math Object
