IsLetter()

OutputVar := MfChar.IsLetter(c)
OutputVar := MfChar.IsLetter(s, index)

MfChar.IsLetter(c)

Indicates whether the specified character of c is categorized as a Unicode letter.

Returns

Returns true if c is a Unicode letter; Otherwise, false.

MfChar.IsLetter(s, index)

Indicates whether the specified character is categorized as a Unicode letter for the character at position index in s.

Returns

Returns true if the character at position index in s is a Unicode letter; Otherwise, false.

Parameters

c

The character to evaluate. Can be a var containing character or MfChar instance or string var containing hex value Eg:"0x0061". c corresponds to a single linguistic Unicode character.

s

A string. Can be a string var or MfString instance.

index

The zero-based index position of the character to evaluate in s. Can be a Integer var or MfInteger instance.

Throws

Throws MfInvalidOperationException if not called as a static method.
Throws MfArgumentOutOfRangeException if index is not in the valid range of s.
Throws MfNotSupportedException if call to method is outside its overloads.
Throws MfInvalidOperationException if not called as a static method.

Remarks

Static Method.
This method determines whether a Char is a member of any category of Unicode letter. Unicode letters include the following:

• Uppercase letters, such as U+0041 (LATIN CAPITAL LETTER A) through U+005A (LATIN CAPITAL LETTER Z), or U+0400 (CYRILLIC CAPITAL LETTER IE WITH GRAVE) through U+042F (CYRILLIC CAPITAL LETTER YA). These characters are members of the MfUnicodeCategory.UppercaseLetter category.
• Lowercase letters, such as U+0061 (LATIN SMALL LETTER A) through U+007A (LATIN SMALL LETTER Z), or U+03AC (GREEK SMALL LETTER ALPHA WITH TONOS) through U+03CE (GREEK SMALL LETTER OMEGA WITH TONOS). These characters are members of the MfUnicodeCategory.LowercaseLetter category.
• Title case letters, such as U+01C5 (LATIN CAPITAL LETTER D WITH SMALL LETTER Z WITH CARON) or U+1FFC (GREEK CAPITAL LETTER OMEGA WITH PROSGEGRAMMENI). These characters are members of the MfUnicodeCategory.TitlecaseLetter category.
• Modifiers, such as U+02B0 (MODIFIER LETTER SMALL H) through U+02C1 (MODIFIER LETTER REVERSED GLOTTAL STOP), or U+1D2C (MODIFIER LETTER CAPITAL A) through U+1D61 (MODIFIER LETTER SMALL CHI). These characters are members of the MfUnicodeCategory.ModifierLetter category.
• Other letters, such as U+05D0 (HEBREW LETTER ALEF) through U+05EA (HEBREW LETTER TAV), U+0621 (ARABIC LETTER HAMZA) through U+063A (ARABIC LETTER GHAIN), or U+4E00 (<CJK Ideograph, First>) through U+9FC3 (<CJK Ideograph, Last>). These characters are members of the MfUnicodeCategory.OtherLetter category.