My notification bar went missing. Please help.

[m_a_c_e_y24]

My notification bar (the bar at the top that displays new messages, new E-mail, time, and the battery) is gone. I'd really like to know how to get it back. Please message me for any information on how to fix this.

 

[94lt1]

Hello and welcome.. which phone do you have??

 

[Dave12308]

And to further elaborate, which OS version are you running on said phone?