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Adding elements to a map

To add a new element to a map, use the Put() method. The put method takes two parameters, the first parameter is the key and the second parameter is the value.

Following is an example of a map which contains products and its prices.

In the above example:

The keyword Map is used to declare a map which can hold key value pairs.
The key is a string and value is an integer.
Using the put() method, the key and values are inserted into the map.

Note

Map keys are case-sensitive; "iphone" and "Iphone" will be treated as separate keys.
A Map key cannot have duplicate values. If you add a duplicate key, the latest value will overwrite the previous one.

Try It Yourself

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