Returns true or false if a character is a letter.
 

1 character.isLetter

<character.isLetter>
    <data /> !
</character.isLetter>

Exceptions

requires 1 argument, received [...]

Missing a parameter.

single character required while received [...]

A single character is required.

Example

Show if it is a letter.

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<xsql-script name='character.isLetter_sample1'>
    <body>
        <println>
            <character.isLetter>7</character.isLetter>
        </println>
        <!-- Show false -->
        <println>
            <character.isLetter>f</character.isLetter>
        </println>
        <!-- Show true -->
    </body>
</xsql-script>
Example

The result will be:

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false
true