How to Add CKEditor in Drupal

Following Steps need to follow.

First Download 3 file.

1. Download CKEditor module(ex.ckeditor 7.x-1.2). To download click here.
2. Download CKEditor Software(ex.CKEditor 3.6.6) .To download click here.
3.  Download imce Software(ex.imce-7.x-1.4.tar.gz) .To download click here 
4. Unzip all the zip files which are downloaded. After that copy the CKEditor software folder. 
5. Inside the CKEDitor module folder there is folder name CKEditor, paste the software folder in that folder.
6. Now copy the CKEditor module folder and IMCE folder into the drupal project folder in sites/all/module.
7. And goto admin panel and click Modules menu and install  there.
8. Later installed Click CKEditor Configure settings. There you will find Full option and you will find edit for the Full.
9. In that there is an option like File Browser Settings and in that "File browser type" as "IMCE"
10. And save that.
11. Come to Page adding part, there you will find ckeditor. If you tried to click image to import there you don't find browse option
12. No need to worry. Change Text format as "Full HTML".
13. Then you will see browse option.
14. Finished.