Node.js console.count() Method

The console.count() method is an inbuilt application programming interface of the console module which is used to count label passed to it as a parameter, by maintaining an internal counter for that specific label.

Syntax:

console.count(label)

Parameters: This method has one parameter as mentioned above and described below:

• label: It is an optional parameter specifies the label to be counted. Default value is “default”.

Return Value: This method outputs the count of this function called with the specified label to the stdout.

Below examples illustrate the use of console.count() method in Node.js:

Example 1:

// Node.js program to demonstrate the
// console.count() Method

// Accessing console module
const console = require('console');

// Calling console.count()
console.count("a");
console.count("b");
console.count("a");
console.count("a");
console.count("a");
console.count("b");
console.count("b");
console.count("b");

Output:

a: 1
b: 1
a: 2
a: 3
a: 4
b: 2
b: 3
b: 4

Example 2:

// Node.js program to demonstrate the
// console.count() Method

// Accessing console module
const console = require('console');

// Calling console.count() method
// with no parameter to count
// default label
console.count();
console.count("a");
console.count("b");
console.count("a");
console.count("a");
console.count();
console.count();
console.count();
console.count("b");

Output:

default: 1
a: 1
b: 1
a: 2
a: 3
default: 2
default: 3
default: 4
b: 2

Note: The above program will compile and run by using the node filename.js command.

Reference: https://nodejs.org/api/console.html#console_console_count_label