Java MCQ: Which of the following can be a valid value for a char data type?
Answer:
Explanation:
In Java, the char data type is used to store a single 16-bit Unicode character. A char can represent any character from the Unicode character set, which includes not only the standard ASCII characters but also characters from various languages, symbols, and special characters. The char type in Java is enclosed in single quotes, like 'A'. Additionally, a char can also store an integer value that corresponds to the character’s Unicode or ASCII value, such as 65, which represents the character ‘A’.
For example, both of the following declarations are valid:
char letter = 'A';
char letterAscii = 65;
System.out.println(letter); // Outputs: A
System.out.println(letterAscii); // Outputs: A
In the first case, 'A' is directly assigned to the char variable, while in the second case, the integer value 65 is assigned, which corresponds to ‘A’ in the ASCII table. This flexibility allows the char type to be used both for storing specific characters and for working with character codes directly, making it versatile in text processing tasks.
However, it’s important to note that using double quotes like "A" represents a String in Java, not a char, and is therefore not valid for the char data type. The char type’s ability to store both character literals and their corresponding numeric values is particularly useful in scenarios involving character encoding, such as converting between characters and their numeric representations or manipulating text at a lower level.
Reference links:
https://www.javaguides.net/p/java-tutorial-learn-java-programming.html