Chapter 12.2, Problem 12.2CP

Program Plan Intro

Character by character text processing:

• Strings can be accessed or manipulated by using an individual text that is present.
• Different programming language access the string individually in a different way, some prefer the string gets accessed through subscript notation.
• String is considered as list of characters.

Accessing string using subscript notation:

• The string that are accessed using the subscript notation uses subscript “0” to hold the first character and similarly till the last character.
• The last character of the string will be “\0”.
• The first value the index value will be “0” and to find the last character use “length(variable)-1”

Example:

//declare and define a string

Declare String txt = "Hai"

Explanation:

In the above declaration, the given string  gets processed in the following way:

txt[0] will hold “H”.

txt[1] will hold “a”.

txt[2] will hold “i”.

Changing the occurrence of the string value that is declared:

• Every value in the string gets accessed individually using the index or subscript value.
•  In order to change the character located at a particular position, the index value can be used and it is made as shown below:

Example:

//set the value located at the position 0 as defined

Set txt[0]= “T”

Explanation:

The above line mentioned is used to replace or overwrite the content that is present at the first position.

The word “H” will be replaced with the word “T” for the string “txt” that is declared.