NCERT Book Class 11 Computer Science Lists

NCERT Class 11 Computer Science Lists

Introduction

Like a String, list also is sequence data type. It is an ordered set of values enclosed in

square brackets []. Values in the list can be modified, i.e. it is mutable. As it is set of

values, we can use index in square brackets [] to identify a value belonging to it. The

values that make up a list are called its elements, and they can be of any type.

We can also say that list data type is a container that holds a number of elements in a

given order. For accessing an element of the list, indexing is used.

Its syntax is:

Variable name [index] (variable name is name of the list).

It will provide the value at „index+1‟ in the list. Index here, has to be an integer valuewhich

can be positive or negative. Positive value of index means counting forward from

beginning of the list and negative value means counting backward from end of the list.

Remember the result of indexing a list is the value of type accessed from the list.

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