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8.4 Let s1 be " Welcome " and s2 be " welcome ". Write the code for the following
statements:
(a) Check whether s1 is equal to s2 and assign the result to a Boolean variable
isEqual.
(b) Check whether s1 is equal to s2, ignoring case, and assign the result to a
Boolean variable isEqual.
(c) Check whether s1 has the prefix AAA and assign the result to a Boolean variable b.
(d) Check whether s1 has the suffix AAA and assign the result to a Boolean variable b.
(e) Assign the length of s1 to a variable x.
(f) Assign the first character of s1 to a variable x.
(g) Create a new string s3 that combines s1 with s2.
(h) Create a substring of s1 starting from index 1.
(i) Create a substring of s1 from index 1 to index 4.
(j) Create a new string s3 that converts s1 to lowercase.
(k) Create a new string s3 that converts s1 to uppercase.
(l) Create a new string s3 that trims whitespace characters on both ends of s1.
(m) Replace e with E in s1.
(n) Assign the index of the first occurrence of character e in s1 to a variable x.
(o) Assign the index of the last occurrence of string abc in s1 to a variable x.
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