Regarding writing chapter shows error. please help
Title
Question
This is pdfTeX, Version 3.14159265-2.6-1.40.16 (MiKTeX 2.9)
\r\nentering extended mode
\r\n(C:/Users/Admin/Desktop/Latex/third3.tex
\r\nLaTeX2e <2015/10/01> patch level 2
\r\nBabel <3.9n> and hyphenation patterns for 69 languages loaded.
\r\n("C:\\Users\\Admin\\AppData\\Local\\Programs\\MiKTeX 2.9\\tex\\latex\\base\\article.cls"
\r\nDocument Class: article 2014/09/29 v1.4h Standard LaTeX document class
\r\n("C:\\Users\\Admin\\AppData\\Local\\Programs\\MiKTeX 2.9\\tex\\latex\\base\\size12.clo"))
\r\n(third3.aux) (third3.toc)
\r\n! Undefined control sequence.
\r\nl.10 \\chapter
\r\n{First Chapter}
\r\n?
LaTeX-Old-Version Report-Writing 06-07 min 40-50 sec