JavaScript Map size Property

Last Updated : 04 Jul, 2024

Map is a collection of elements where each element is stored as a Key, value pair. The Map.size property returns the number of key, and value pairs stored in a map.

Syntax

mapName.size

Return Value

An integer representing the number of key, value pairs stored in a map.

The below examples illustrate the Map.size property.

Example 1:

JavaScript

let GFGmap = new Map();

// Adding key, value pairs to the map
GFGmap.set('1', 'Apple');
GFGmap.set('2', 'Banana');
GFGmap.set('3', 'Mango');

// Printing number of key, value
// pairs stored in the map
console.log(GFGmap.size);

Output:

Example 2:

JavaScript

let GFGmap = new Map();

// Adding key, value pairs to the map
GFGmap.set('a', 'Apple');
GFGmap.set('b', 'Ball');
GFGmap.set('c', 'Cat');
GFGmap.set('d', 'Dog');

// Printing number of key, value
// pairs stored in the map
console.log(GFGmap.size);