How to correctly implement redirection in mod_rewrite?

Question

Apache HTTP Server

How to correctly implement in mod_rewrite redirect
http://site/admin/ to admin.php
http://site/
http://site/other/ to index.php
do this

AddDefaultCharset utf-8

RewriteEngine on
RewriteBase /

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^admin\/$ admin.php 
RewriteRule ^(.*)$ index.php

everything redirects to index.php only

Answer 1

AddDefaultCharset utf-8

RewriteEngine on
RewriteBase /
RewriteRule ^admin\/$ admin.php 
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php