StringLength
StringLength["string"]
gives the number of characters in a string.
Details
- StringLength counts special characters such as
as single characters, even if their full names involve many characters. - StringLength[{s1,s2,…}] gives the list of lengths of each of the si.
- StringLength[BioSequence["type","seq"]] will give the length of the string "seq".
Examples
open all close allBasic Examples (1)
Scope (4)
Find lengths of all strings in a list:
StringLength[{"cat", "dog", "fish", "coelenterate"}]StringLength treats special characters just like ordinary ones:
StringLength["◆αβγ⟷𝒜ℬ𝒞↵"]Newlines count as one character:
"ab
cd"StringLength[%]Find the length of a biomolecular sequence:
StringLength[BioSequence["DNA", "CTTCGACTACCAGCGGGTCGAACGGCCCATGGCATC"]]Applications (1)
Properties & Relations (2)
The empty string has zero length:
StringLength[""]StringLength counts the underlying character codes, not selectable characters:
StringLength["👨🍳"]The length is equivalent to the length of the list returned by ToCharacterCode:
Length[ToCharacterCode["👨🍳"]]It is also equivalent to the length of the list returned by Characters:
Length[Characters["👨🍳"]]Possible Issues (2)
Formatting constructs are included in giving lengths of formatted strings:
FullForm["red"]StringLength["red"]StringLength counts every character as length 1, regardless of the length of its full name:
FullForm["αβγ"]StringLength["αβγ"]
An Elementary Introduction to the Wolfram Language
NKS|OnlineText
Wolfram Research (1988), StringLength, Wolfram Language function, https://reference.wolfram.com/language/ref/StringLength.html (updated 2020).
CMS
Wolfram Language. 1988. "StringLength." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2020. https://reference.wolfram.com/language/ref/StringLength.html.
APA
Wolfram Language. (1988). StringLength. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/StringLength.html