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Finding list size

To find the number of elements(size) of a list in apex, use the size() method.

Following is an example of finding the size of a list:

In the above example:

The size() method is used to find the number of elements in a list.
The size() method can be applied to list variables and does not require any input parameters.

The list must be initialized before applying the size() method to avoid a null pointer exception.