Icloud

Unless you have been using iCloud Photo Library, your photos are not in iCloud.

If you have been using iCloud Photo Library, then you can go to iCloud.com on any computer, sign in, and see your photos in the Photos app on iCloud.com.

If you have not been using iCloud Photo Library, then if you have been making regular backups of your device, you should be able to restore most of your photos by restoring the backup to an iOS device: Restore from an iCloud or iTunes backup - Apple Support

Best of luck,

GB

Device or computer? Did something happen to your photos? Have you checked the Photos app/application and at iCloud.com/Photos using a computer browser for a Recently Deleted album? More information would help.