Question

String length(), charAt(#), concat(str) or str 3 = str1 + str2, toUpperCase(), toLowerCase(), equals(), equalsIgnoreCase(), compareTo(str), startsWith("a"), endsWith("a"), contains(str)

a. using the following: String st. "ExamPractice";
b. what is returned from: st.length()

Answer 1

The returned value from st.length() is 12.

Explanation:

The length() method in Java returns the number of characters in a string. In this case, the string “ExamPractice” consists of 12 characters, so when we call the length() method on the string st, it returns the value 12. This is because the method counts each character in the string, including letters, numbers, symbols, and spaces.

The calculation for st.length() is straightforward - it simply counts the characters in the given string. In this case, “ExamPractice” contains 12 characters, so when we use the length() method on the string st, it returns 12. This can be useful when we need to know the size of a string for various operations or validations in a program.

In programming, knowing the length of a string is essential for tasks such as looping through each character, validating input lengths, or formatting output. The length() method provides a simple and efficient way to obtain this information without having to manually count the characters in a string.