/Java/How to check whether a character is alphabet or not in java

How to check whether a character is alphabet or not in java

//Long version:
private (static) boolean isAlphabet(char c) {
    return (c >= 'a' && c <= 'z') ||
           (c >= 'A' && c <= 'Z');
}

//SHort version:
private (static) boolean isAlphabet(char c) {
	return if (c in 'a'..'z' || с in 'A'..'Z' || c in '0'..'9');
}

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