Chapter 3.3, Problem 19SCP

a.

Explanation of Solution

Result of “str1.length()”:

• The function “length()”is used to return the number of characters in the given string.
• The variable “str1” is assigned the string value “Frodo Baggins”...

b.

Explanation of Solution

Result of “str1.charAt(7)”:

• The function “charAt()”is used to return the character at the given index position.
• The variable “str1” is assigned the string value “Frodo Baggins”...

c.

Explanation of Solution

Result of “str2.charAt(0)”:

• The function “charAt()”is used to return the character at the given index position.
• The variable “str2” is assigned the string value “Gandalf the GRAY”...

d.

Explanation of Solution

Result of “str1.indexOf(“o”)”:

• The function “indexOf()”is used to return the index of the first occurrences of the given character.
• The variable “str1” is assigned the string value “Frodo Baggins”...

e.

Explanation of Solution

Result of “str2.toUpperCase()”:

• The function “toUpperCase()”is used to return the string with all uppercase letters...

f.

Explanation of Solution

Result of “str1.toLowerCase().indexOf(“B”)””:

• The function “toLowerCase()”is used to return the string with all lowercase letters.
• The “str1.toLowerCase()” returns the string “Frodo Baggins” with all lowercase letters, which is “frodo baggins”...

g.

Explanation of Solution

Result of “str1.substring(4)”:

• The function “substring()”is used to return the substring for the specified index range.
• The variable “str1” is assigned the string value “Frodo Baggins”...

h.

Explanation of Solution

Result of “str2.substring(3,14)”:

• The function “substring()”is used to return the substring for the specified index range.
• The variable “str2” is assigned the string value “Gandalf the GRAY”...

i.

Explanation of Solution

Result of “str2.replace(“a”, “oo”)”:

• The function “replace()”is used to return the new string resulting from replacing all the occurrences of old characters in the string with new characters.
• The variable “str2” is assigned the string value “Gandalf the GRAY”...

j.

Explanation of Solution

Result of “str2.replace(“gray”, “white”)”:

• The function “replace()”is used to return the new string resulting from replacing all the occurrences of old characters in the string with new characters.
• The variable “str2” is assigned the string value “Gandalf the GRAY”.
• The given expression “str2...

k.

Explanation of Solution

Result of “str1”.replace(“r”, “range”):

• The function “replace()”is used to return the new string resulting from replacing all the occurrences of old characters  in the string with new characters.
• In the given expression “str1” is the string...