Application

Supported Browsers:

Whenever we need the value of base 2 logarithms of any number that time we take the help of this method. Its value is needed many times in mathematics problems.

Let’s see the JavaScript code for this application:

Example 1: This example shows the demonstration of the above approach.

Javascript

// taking parameter as number 14 and 
//calculated in the form of method.
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

We have a complete list of Javascript Math methods, to check those please go through this JavaScript Math Object Complete Reference article.

JavaScript Math log2() Method

The Javascript Math.log2() is an inbuilt method in JavaScript that gives the value of base 2 logarithms of any number.

Syntax:

Math.log2(p)

Parameters: This method accepts a single parameter p which is any number whose base 2 logarithms is to be calculated.

Returns: It returns the value of base 2 logarithms of any number.

Let’s see some JavaScript code on this method:

Example 1: In this example, we will see the logs of various numbers using the Math.log2() method.

Javascript

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

Output

9.965784284662087
3.584962500721156
4.700439718141092
2.321928094887362

Example 2: In this example, we will use a for loop to get the log of numbers that are a multiple of three upto 20.

Javascript

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

Output

1.584962500721156
2.584962500721156
3.169925001442312
3.584962500721156
3.9068905956085187
4.169925001442312

Errors and exceptions: Parameters for this method should always be a number otherwise it returns NaN i.e, not a number when its parameter is taken as a string.

Example 1: In this example, the Math.log2() method returns Nan as a string is passed in the method.

Javascript

// Parameters for this method 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

Example 2: This method 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.log2(1 + 2i));

Output:

Error: Invalid or unexpected token

Tags:

#javascript-math #JavaScript-Methods #JavaScript #Web Technologies

Supported Browsers:

Application

Javascript

JavaScript Math log2() Method

Javascript

Javascript

Javascript

Javascript

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