How to not repeat word in \index

Question

To make index I have to write word two times,

\documentclass[12pt,oneside]{book}
\usepackage{makeidx}
\makeindex
\begin{document}
This will not print \index{anything} !!! 
However it will make an entery in Index. 
To print the word in text and index you need to write word \index{word}.
\printindex
\end{document}

To make an index for we need to write word \index{word}. I find it redundant.

Is there any way (package or code) to just write \index{word}?

Answer 1

You can define a new command (eg \iindex) with one argument and use this argument to call \index and to print it on the text.

\newcommand{\iindex}[1]{#1\index{#1}} 

and then you simply type \iindex{word}.

\documentclass[12pt,oneside]{book}
\usepackage{makeidx}
\makeindex
\newcommand{\iindex}[1]{#1\index{#1}} %%This is new command
 %%%and then you type \iindex{word}

\begin{document}
This will not print \index{anything} !!! 
However it will make an entry in Index. 
To print the word in text and index you need to write word \index{word}. 
Or \iindex{word} single.
\printindex
\end{document}