Is my iCloud the same password for my apple id

iCloud uses your Apple ID and password. If you only have one Apple ID, it would be the same ID and password as you used to log into this forum. If you have another and have forgotten the ID or password, see the following:

If you forgot your Apple ID email address or phone number - Apple Support

or

If you forgot your Apple ID password - Apple Support

What is iCloud is well explained in the articles What is iCloud? - Apple Support 

Introduction to iCloud - Apple Support

Apple id is a mail address signed in with device using iCloud domain , so the term " iCloud " can never be same as Apple ID password .

If you’re trying to login to icloud you should login using your Apple ID email/password.