JavaScript - Math.log1p() Method
The JavaScript Math.log1p() method returns the natural logarithm of (1 + number), i.e., log(1+number).
Syntax
Math.log1p(x)
Parameters
x |
Specify the number. |
Return Value
Returns the natural logarithm of (1 + x), i.e., log(1+x).
If the x is less than -1, it returns NaN.
If the x is -1, it returns -Infinity.
Example:
In the example below, Math.log1p() method is used to calculate the log(1+number).
var txt; txt = "Math.log1p(0) = " + Math.log1p(0) + "<br>"; txt = txt + "Math.log1p(10) = " + Math.log1p(10) + "<br>"; txt = txt + "Math.log1p(50) = " + Math.log1p(50) + "<br>"; txt = txt + "Math.log1p(-1) = " + Math.log1p(-1) + "<br>"; txt = txt + "Math.log1p(-2) = " + Math.log1p(-2) + "<br>";
The output (value of txt) after running above script will be:
Math.log1p(0) = 0 Math.log1p(10) = 2.3978952727983707 Math.log1p(50) = 3.9318256327243257 Math.log1p(-1) = -Infinity Math.log1p(-2) = NaN
❮ JavaScript - Math Object
