Slicing Method
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The slicing method is a technique used in programming languages like Python to extract a portion or a subset of a sequence or list. The method is also useful for copying a sequence or creating a new sequence from part of an existing sequence.
Syntax of Slicing:
sequence[start:end]
Where,
‘start’ is the index from where to start the slicing process (inclusive).
‘end’ is the index till where to slice (exclusive).
Example:
# Creating a sequence
mylist = [1, 2, 3, 4, 5, 6, 7, 8]
# Slicing to extract a portion of list
subset = mylist[2:6]
# Printing the subset
print(subset)
Output:
[3, 4, 5, 6]
In the above example, the slicing method is used to extract elements from index 2 to index 5, which are 3, 4, 5, and 6. The start argument is inclusive, while the end argument is exclusive.
The slicing method can also be used to extract elements from the beginning of the list by not specifying the start index, as shown below:
# Slicing from start till index 3
subset = mylist[:3]
# Printing the subset
print(subset)
Output:
[1, 2, 3]
Similarly, to extract elements till the end of the list, we can use the following syntax:
# Slicing from index 4 till end
subset = mylist[4:]
# Printing the subset
print(subset)
Output:
[5, 6, 7, 8]
In conclusion, the slicing method is a useful technique in Python that allows a programmer to extract a portion of a sequence, create a new sequence out of an existing sequence, or copy a sequence.
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