2.8.3 Characters in Strings
| Characters["string"] | convert a string to a list of characters | StringJoin[{" ", " ", ... }] | convert a list of characters to a string |
Converting between strings and lists of characters. | This gives a list of the characters in the string. | |
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Characters["A string."]
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| You can apply standard list manipulation operations to this list. | |
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| StringJoin converts the list of characters back to a single string. | |
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| DigitQ[string] | test whether all characters in a string are digits | | LetterQ[string] | test whether all characters in a string are letters | | UpperCaseQ[string] | test whether all characters in a string are upper-case letters | | LowerCaseQ[string] | test whether all characters in a string are lower-case letters |
Testing characters in a string. | All characters in the string given are letters. | |
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| Not all the letters are upper case, so the result is False. | |
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UpperCaseQ["Mixed"]
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| ToUpperCase[string] | generate a string in which all letters are upper case | | ToLowerCase[string] | generate a string in which all letters are lower case |
Converting between upper and lower case. | This converts all letters to upper case. | |
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ToUpperCase["Mixed Form"]
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CharacterRange[" ", " "] | generate a list of all characters from  and  |
Generating ranges of characters. | This generates a list of lower-case letters in alphabetical order. | |
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CharacterRange["a", "h"]
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| Here is a list of upper-case letters. | |
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CharacterRange["T", "Z"]
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| Here are some digits. | |
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CharacterRange["0", "7"]
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CharacterRange will usually give meaningful results for any range of characters that have a natural ordering. The way CharacterRange works is by using the character codes that Mathematica internally assigns to every character. | This shows the ordering defined by the internal character codes used by Mathematica. | |
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CharacterRange["T", "e"]
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