List slicing: • The process of choosing a range of data items from a list is called as list slicing. • In Python, an expression that chooses a sub list from a sequence is called as a slice. • A slice is a span of data items that are taken out from a list. • Generally, the slice expression has start and end indices as its inputs. • If the end index is not given, then the list’s length is taken as the end index. • The start and end indices in the list slice expression can also have the negative integers as their values. • The negative integers indicate the location that is relative to the end of the list. Syntax: In python, the list slice expression with a negative index has the below format. #Create an expression to slice the list listname[negative_index:] or #Create an expression to slice the list listname[:negative_index]

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Chapter 7, Problem 5SA

Program Plan Intro

List slicing:

• The process of choosing a range of data items from a list is called as list slicing.

• In Python, an expression that chooses a sub list from a sequence is called as a slice.

• A slice is a span of data items that are taken out from a list.

• Generally, the slice expression has start and end indices as its inputs.

• If the end index is not given, then the list’s length is taken as the end index.

• The start and end indices in the list slice expression can also have the negative integers as their values.

• The negative integers indicate the location that is relative to the end of the list.

Syntax:

In python, the list slice expression with a negative index has the below format.

#Create an expression to slice the list

listname[negative_index:]

or

#Create an expression to slice the list

listname[:negative_index]

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