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:

// Different numbers are being taken 
// as the parameter of the function. 
console.log(Math.log2(1000)); 
console.log(Math.log2(12)); 
console.log(Math.log2(26)); 
console.log(Math.log2(5)); 

/div>

Output:

> 9.965784284662087
> 3.584962500721156
> 4.700439718141092
> 2.321928094887362

Code #2:

// Taken parameter from 1 to 19 incremented by 3. 
for (i = 1; i < 20; i += 3) { 
    console.log(Math.log2(i)); 
} 

Output:

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

Errors and exceptions:

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
```
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

JavaScript | Math.log2() function

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