Introduction to GoLang

We can access the value corresponding to a key in a map using the following syntax:

For example:

The expression prices["apple"] essentially references the memory location where the value 100 is stored; hence, it acts like a variable. Therefore, we can edit the value stored at that key using the = operator:

We can use the same assignment syntax to create a new key in the map:

If the provided keyName doesn't exist in the map, it will create and add a new key to the map with the assigned value.

What will be the output of the following code?

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map[someKey:7]

map[]

Error: Can't add item to an empty map

None

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