I have a crack iPhone 5s.the screen is damage including the LCD.but it won't turn on at all?

IIm getting a new screen and LCD & getting it fixs… When it get repair will the iPhone start working again?

I would assume that "repair" means it will work again.

Not necessarily there might be other damage

A repair shop will check everything - with modern phones, the screen is rather important to all functions. I remember when even if the screen was broken, you still had the physical keypad to dial on!