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JavaScript Math log1p() Method
Last Updated :
12 Jul, 2024
Javascript Math.log1p() is an inbuilt function in JavaScript that gives the value of the natural logarithm of 1 + p number. The natural logarithm is of base e, where e is an irrational and transcendental number approximately equal to 2.718.
Syntax:
Math.log1p(1 + p)
Below example illustrate the JavaScript Math.log1p() Method in JavaScript:
Example 1: In this example, we will find the logarithms of some basic numbers.
javascript
// Different numbers are being taken
// as the parameter of the function.
console.log(Math.log1p(1000));
console.log(Math.log1p(12));
console.log(Math.log1p(26));
console.log(Math.log1p(5));
Output:
6.90875477931522
2.5649493574615367
3.295836866004329
1.791759469228055
Example 2: In this example, we will use a for loop to get the logarithms of numbers from 1 to 19 with an increment of 3.
javascript
// Taken parameter from 1 to 19 incremented by 3.
for (i = 1; i < 20; i += 3) {
console.log(Math.log1p(i));
}
Output:
0.6931471805599453
1.6094379124341003
2.0794415416798357
2.3978952727983707
2.639057329615259
2.833213344056216
2.995732273553991
Errors and exceptions: Parameters for this function should always be a number otherwise it returns NaN i.e, not a number when its parameter is taken as a string.
Example 1: Here NaN comes in output as we have passed a string in the Math.log1p() function.
javascript
// Parameters for this function should always be a
// number otherwise it return NaN i.e, not a number
// when its parameter taken as string.
console.log(Math.log1p("gfg"));
Output:
NaN
Example 2: This function gives an error when its parameter is taken as a complex number because it accepts only integer value as the parameter.
javascript
// Parameters can never be a complex number because
// it accept only integer value as the parameter.
console.log(Math.log1p(1 + 2i));
Output:
Error: Invalid or unexpected token
Example 3: This function returns NaN i.e, not a number if the parameter is less than -1 because the number should be any positive number i.e, greater than 0.
javascript
// This function return NaN i.e, not a number
// if the parameter is less
// than -1 because number should be
// any positive number i.e, greater than 0.
console.log(Math.log1p(-2));
Output:
NaN
Supported Browsers: The browsers supported by JavaScript Math.log1p( ) function are listed below:
- Google Chrome 38 and above
- Edge 12 and above
- Firefox 25 and above
- Opera 25 and above
- Safari 8 and above
We have a complete list of Javascript Math Object methods, to check those please go through Javascript Math Object Complete reference article.
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