D3.js count() method

With the help of d3.count() method, we can get the count of valid values in the specified iterable data structure.

Syntax:

d3.count(iterable[, accessor])

Return value: It returns the count of valid values.

Note: To execute the below examples you have to install the d3 library by using the command prompt for the following command.

npm install d3

Example 1: In this example, we can see that by using d3.count() method, we are able to get the count of valid values in the specified iterables.

Output:

4

Example 2:

Output :

3