Using Iterators with Built in Functions

Using iter()

The iter() function is used to obtain an iterator from an iterable.

When iter() is called on an iterable object, Python returns an iterator that can traverse its elements.

Here data is an iterable and it is an iterator created from it.

The iterator keeps track of the current position internally.

The next() function retrieves the next value from an iterator.

Each call to next() advances the iterator by one step.

The iterator remembers its state between calls.

When no more values are available, calling next() raises an exception.

Manual iteration refers to explicitly controlling iteration using iter() and next().

This approach is useful when fine grained control over iteration is required.

Manual iteration is commonly used in advanced data processing and debugging scenarios.