1(ix)
What is the method to check whether a character is a letter or digit?
- (a)isDigit(char)
- (b)isLetterOrDigit()
- (c)isLetterOrDigit(char)
- (d)isLETTERorDIGIT(char)
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isLetterOrDigit(char)
Reason — In Java, the method Character.isLetterOrDigit(char ch) is used to check whether a given character ch is either a letter (A-Z or a-z) or a digit (0-9).
Analysing Other Options:
isDigit(char)– This method only checks if the character is a digit, not a letter.isLetterOrDigit()– Incorrect because this method requires a character parameter.isLETTERorDIGIT(char)– Java methods are case-sensitive, and method names follow camelCase. This method name does not exist.