JavaScript | Math.log2() function

The Math.log10() is an inbuilt function in JavaScript which give the value of base 2 logarithms of any number.
Syntax:

Math.log2(p)

Parameters:

• Here the parameter p is any number whose base 2 logarithms is to be calculated.

Return Values:

• It returns the value of base 2 logarithms of any number.

Examples:

Input:
Math.log2(5)

Output:
2.321928094887362

Explanation:
Here value of bese 2 logarithms of number 5 is 2.321928094887362 as shown output.

Input:
Math.log2(10)

Output:
3.321928094887362

Let’s see some JavaScript code on this function:
Code #1:

Output:

> 9.965784284662087
> 3.584962500721156
> 4.700439718141092
> 2.321928094887362

Code #2:

Output:

> 0
> 2
> 2.807354922057604
> 3.321928094887362
> 3.700439718141092
> 4
> 4.247927513443585

Errors and exceptions:

1. Parameters for this function should always be a number otherwise it return NaN i.e, not a number when its parameter taken as string.

   // 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.log2("gfg"));

   Output:

   > NaN
   

2. This function gives error when its parameter taken as complex number because it accept only integer value as the parameter.

   // Parametes can never be a complex number because // it accept only integer value as the parameter. console.log(Math.log2(1 + 2i));

   Output:

   Error: Invalid or unexpected token
   

Application:
• Whenever we need the value of base 2 logarithms of any number that time we take the help of this function.Its value needed many times in mathematics problem.
  Let’s see JavaScript code for this application:
  Code #1:

  // taking parameter as number 14 and calculated in the form of function. function value_of_base_2_logarithms_of_any_number() {     return Math.log2(14); } console.log(value_of_base_2_logarithms_of_any_number());

  Output:

  > 3.807354922057604