The **`map.length`** function in Dart returns the number of elements (key-value pairs) in the map. In short, this function is used to get the current size of the map. 

Figure 1 shows the visual representation of the `map.length` function:

#   
## Syntax
```dart
int map_name.length
// where the map_name is the name of the map
```
## Parameter
This function does not require a parameter.

## Return value
This function returns the number of elements in the map and is used to get the current size of the map.

## Example
The following code shows how to use `map.length` function in Dart:

import 'dart:convert';

void main() {
  var map_1 = new Map();

  map_1 [1] = 'Tom';
  map_1 [2] = 'Alsvin';
  map_1 [3] = 'Eddie';
  //map containg key value pairs
  print("map_1 length: ${map_1.length}");

  //map empty
  var map_2 = new Map();
  print("map_2 length: ${map_2.length}");

}

What is map.length method in Dart?

Syntax

Parameter

Return value

Example