Set the header using Latex with pagestyle

tyle customization in single-sided documents

Styles can be modified beyond the standard layouts by means of fancyhdr. Below is an example.

\lhead{Guides and tutorials}
\rfoot{Page \thepage}
\section{First Section}
Hello,  here  is  some  text  without  a  meaning.   This  
text  should  show  what  aprinted text will look like at 
this place.  If you read this text, you will get noinformation.  
Really?  Is there no information?  Is there a diㄦence between 
this ...

To customize the footer and header in your document first import the package fancyhdr with


After that, the “fancy” style is set by \pagestyle{fancy}. The command \fancyhf{} clears the header and footer, otherwise the elements of the default “plain” page style will appear.

Below, a description of the rest of the commands and a few more whose usage is similar.

Prints the text included inside the braces on the right side of the header.
\lhead{Guides and tutorials}
Prints the text set inside the braces on the left side of the header.
\chead{ }
Similar to the previous commands, in this case the text is centred on the header.
\rfoot{Page \thepage}
Prints the word “Page” and next the page number which is automatically set by \thepage on the right side of the footer. See the reference guide for a list of commands that automatically generate content (Section numbers, chapters and so on).
\lfoot{ }
This prints the parameter passed inside the braces on the left side of the footer.
\cfoot{ }
Similar to the previous two commands, prints its parameter on the centre of the footer.


Write the else if block with algorithm2e

To combine such conditions, write each as a separate component using \uIf and \uElseIf (and \uElse, if needed):

To remove the vertical line, add “\SetAlgoNoLine” after “\begin{algorithm}[!h]”

enter image description here




  \uIf{if condition}{
    something if \;
  \uElseIf{elseif condition}{
    something elseif \;
    something else \;
\caption{An algorithm}


list all files in a folder

dir command:

/B Uses bare format (no heading information or summary).


/S Displays files in specified directory and all subdirectories.
dir /s /b >filelist.txt


dir > myfile.txt

Takes the output of dir and re-routes it to the file myfile.txt instead of outputting it to the screen

dir /on

List the files in alphabetical order by the names of the files.



subset & superset 

In mathematics, especially in set theory, a set A is a subset of a set B, or equivalently B is a superset of A, if A is “contained” inside B, that is, all elements of A are also elements of BA and B may coincide. The relationship of one set being a subset of another is called inclusion or sometimes containment.


If A and B are sets and every element of A is also an element of B, then:

  • A is a subset of (or is included in) B, denoted by {\displaystyle A\subseteq B}A\subseteq B,
or equivalently

  • B is a superset of (or includes) A, denoted by {\displaystyle B\supseteq A.}B\supseteq A.