Concept explainers
Display str[0]:
The above statement is used to display the first character of the string “str”.
Hence, the correct answer is option “B”.
Explanation of Solution
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 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”.
Explanation for the incorrect answer:
Display str[1]:
The above statement is used to display the second character of the “str” string.
Hence, the option “A” is wrong.
Display str[first]:
The above statement is used to display the character present at the value of “first” , ”,(that is the value that variable last holds ) of the “str” string.
Hence, the option “C” is wrong.
Display str:
The above statement is used to display the entire content of the string “str”.
Hence, the option “D” is wrong.
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Chapter 12 Solutions
Starting Out with Programming Logic and Design (4th Edition)
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