InString [n]
is a global object that is assigned to be the text of the n^(th) input line.
InString
InString [n]
is a global object that is assigned to be the text of the n^(th) input line.
Details
- InString [n] gives the string that the Wolfram Language read for the n^(th) input line. In a text-based interface, the string includes all intermediate newlines in the input, but not the newline at the end.
- In a notebook interface, InString will typically return a string representing a typeset expression.
- The value of InString [n] is assigned after the input is verified to be syntactically correct, and after any function given as the value of $PreRead has been applied.
- InString [] gives the text of the last input line.
- InString [-k] gives the text of the input k lines back.
Examples
open all close allBasic Examples (1)
Show input as a string:
With StandardForm input, the string represents a typeset expression:
Scope (1)
Create three inputs:
Retrieve the first input string:
Get the next-to-last input string:
Properties & Relations (1)
InString returns a string:
In StandardForm , calling ToExpression on the result will return a typeset expression:
MakeExpression converts the typeset expression to the input expression:
See Also
Related Guides
History
Introduced in 1991 (2.0)
Text
Wolfram Research (1991), InString, Wolfram Language function, https://reference.wolfram.com/language/ref/InString.html.
CMS
Wolfram Language. 1991. "InString." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/InString.html.
APA
Wolfram Language. (1991). InString. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/InString.html
BibTeX
@misc{reference.wolfram_2025_instring, author="Wolfram Research", title="{InString}", year="1991", howpublished="\url{https://reference.wolfram.com/language/ref/InString.html}", note=[Accessed: 12-January-2026]}
BibLaTeX
@online{reference.wolfram_2025_instring, organization={Wolfram Research}, title={InString}, year={1991}, url={https://reference.wolfram.com/language/ref/InString.html}, note=[Accessed: 12-January-2026]}