\documentclass[10pt,a4paper]{article}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{makeidx}
\usepackage{graphicx}
\usepackage{xepersian}
\settextfont[Scale=1.1]{XB Zar}
\author{omid Karimi}
\begin{document}
%
سلام  %
salam
\end{document}