The `get()` method is used to get the value associated with a key in a Map object.
Basically, this method takes a key as its argument and looks for that key in a map object. Now if it can find that key in the map, then its value will be returned. (Otherwise the value undefined returns instead).
get() Function Parameters:
This method takes one argument, and that is the name of the key in which we want its value.
Note: if the key does not exist in the target map, the return value of this method will be `undefined`.
get() Function Return Value:
The return value of this method is the value associated with the target key (that we set as the argument to the method) in a map object.
Note: if the key does not exist in the target map object, the return value of this method becomes undefined.
const map = new Map(); map.set("John","222-22222222"); map.set(22 , 2000); map.set(true, false); map.set("Jack", "333-3234232"); console.log(map.get("John")); console.log(map.get(22)); //The return value of the next two statements // is undefined. console.log(map.get("pure")); console.log(map.get(1000))
222-22222222 2000 undefined undefined
As you can see, the last two statements returned `undefined`. This is because the keys `pure` and `1000` don’t exist on this map.