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To write subscript say, x subscript 1 , I am writing x_1. However, the problem is that anything following 1 appears to be italic.

Why is it so? I am using Kile as editor.

David Carlisle
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Upendra01
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    don't ignore errors from TeX, if you get an error the typeset output is not intended to be sensible TeX just recovers enough to check for more errors. _ only works in math mode so you need $x_1$ At the _ tex gave an error and inserted a $ to enter math mode, but never leaves it until it reaches something not allowed in math mode, when it would give another error. – David Carlisle Mar 05 '16 at 14:56
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    This is unrelated to [tag:latex3] – David Carlisle Mar 05 '16 at 14:59
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    Please, have you read any LaTeX learning manual? I know it sounds strange, but such books are useful to avoid basic errors like this one. There is a good list of them: http://tex.stackexchange.com/questions/11 – yo' Mar 05 '16 at 15:06
  • I did not get such error, please provide MWE. – Rama Krishna Majety Mar 05 '16 at 15:40
  • I got this error and it was resolved by placing '$' on both sides of x_1 Fr example, to write x subscript i, I have to write $x_1$ – Upendra01 Mar 11 '16 at 06:28

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