Write a method called isAlpha that accepts a character parameter and returns true if that character is either an uppercase or lowercase alphabetic letter.
What will be an ideal response?
```
public boolean isAlpha(char ch)
{
return ( (ch >= 'a' && ch <= 'z') ||
(ch >= 'A' && ch <= 'Z') );
}
```
Note: similar functionality is provided by the Character.isLetter method
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