To add an element to a hash (also known as a map) in Dart, you can use the following syntax:
myMap[key] = value;
Here, myMap is the name of the map, key is the key for the element you want to add, and value is the value you want to assign to the key. Here is an example snippet of code that demonstrates:
void main() {
// Create an empty map
var myMap = {};
// Add an element to the map
myMap['name'] = 'John';
// Print the map
print(myMap);
}
In the above example, we first create an empty map called myMap. Then, we add an element to it using the [] syntax with the key "name" and the value "John". Finally, we print out the map to the console. The output should be {'name': 'John'}.