StringLength ["string"]
gives the number of characters in a string.
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)
Find the number of characters in a string:
Scope (4)
Find lengths of all strings in a list:
StringLength treats special characters just like ordinary ones:
Newlines count as one character:
Find the length of a biomolecular sequence:
Applications (1)
Find the growth rate of a string substitution system:
Properties & Relations (2)
The empty string has zero length:
StringLength counts the underlying character codes, not selectable characters:
The length is equivalent to the length of the list returned by ToCharacterCode :
It is also equivalent to the length of the list returned by Characters :
Possible Issues (2)
Formatting constructs are included in giving lengths of formatted strings:
StringLength counts every character as length 1, regardless of the length of its full name:
See Also
Tech Notes
Related Guides
History
Introduced in 1988 (1.0) | Updated in 1996 (3.0) ▪ 2003 (5.0) ▪ 2004 (5.1) ▪ 2020 (12.2)
Text
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
BibTeX
@misc{reference.wolfram_2025_stringlength, author="Wolfram Research", title="{StringLength}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/StringLength.html}", note=[Accessed: 17-November-2025]}
BibLaTeX
@online{reference.wolfram_2025_stringlength, organization={Wolfram Research}, title={StringLength}, year={2020}, url={https://reference.wolfram.com/language/ref/StringLength.html}, note=[Accessed: 17-November-2025]}