grub prompt i am geting after rebooting before that i delete partions by fdisk
 

i am geting grub> prompt in console mode before this problem i deleted some partions
by useing fdisk /dev/sda which could be
boot or root partions

now i am geting grub> like this
if type tab a list of commands are list
those can work there but i do not know how to slove it .

after restarting system again i got the same grub> so please tell me method(way)
i am very new to this linux world

help me please

Here's a link with things you can do from the grub prompt.

To really help you, we need to know more about what partition/OS you want to boot and whether you want to restore grub or erase grub totally.

You most likely deleted a partition that had grub's config files. So the first part of grub lives in the Master Boot Record and then looks for it's config files on some partition to see what it should do next. Since it can't find them, it just sits there until you tell it what to do.