editing PATH variable on mac

How to edit PATH variable on mac (Lion). I cannot find any file where I can add paths. can someone guide me about it?

Whats the file name? .profile or .bash_profile???

and where I can find it? I have tried

echo 'export PATH=/android-sdk/tools:$PATH' >> ~/.profile

Open and edit /etc/paths using any text editor.

$ sudo vi /etc/paths

(editing text files with vi)

Note: each entry is separated by a new line

/usr/local/bin
/usr/bin
/bin
/usr/sbin
/sbin

Save and close the file. Then restart your terminal.

Based on my own experiences and internet search, I find these places work:

/etc/paths.d

~/.bash_profile

Note that you should open a new terminal window to see the changes.

You may also refer to this this question

You could try this:

> 1. Open the Terminal application. It can be found in the Utilities directory inside the Applications directory. > 2. Type the following: echo 'export PATH=YOURPATHHERE:$PATH' >> ~/.profile, replacing "YOURPATHHERE" with the name of the directory > you want to add. Make certain that you use ">>" instead of one ">". > 3. Hit Enter. > 4. Close the Terminal and reopen. Your new Terminal session should now use the new PATH.

Quoted from ketio.me tutorial (archived copy).

environment.plst file loads first on MAC so put the path on it.

For 1st time use, use the following command

export PATH=$PATH: /path/to/set

use

~/.bash_profile

or

~/.MacOSX/environment.plist

(see Runtime Configuration Guidelines)