can I alter my iCloud email address

Sign out of iCloud and then sign in with your new address.

Apple ID - Manage

Apple ID Name Change

Can I change primary email for Apple ID to another verified email under my icloud account?

You are welcome.

I don't want to sign out then I'll remove all data from my iphone I don't want to lose all my pictures.

I need to correct my Icloud email address without losing all my data? Cab you please help me?

I need to correct my email address on the Icloud. How do I do this without losing all my data?

Apple ID email address or password - What to do after you change

iCloud

Update your Apple ID and password on your iPhone, iPad, iPod touch, Mac, PC, and Apple TV.

iPhone, iPad, and iPod touch

Go to Settings > iCloud.

• If you're signed out, enter your updated Apple ID and password. The data in iCloud will automatically appear on your device after you sign in.
• If you're still signed in with your previous Apple ID:
  1. Scroll down and tap Sign Out, then tap Sign Out to confirm. If you're using iOS 7 or earlier, tap Delete Account, then tap Delete to confirm. You might need to enter your password. Your data will remain in iCloud and will be updated on your device when you sign in to iCloud again.
  2. Enter your updated Apple ID and password.

If you updated your Apple ID email address before signing out of iCloud, and your device repeatedly asks for the password to your previous Apple ID, you can temporarily change your Apple ID to sign in.

My current email address for iCloud is an old gmail address. Can I alter this to use my current Apple log in address ?

Do you have 2 separate Apple IDs? If you are using an e-mail address for your current Apple login/ID, you can't use the same address for another Apple ID.