Using the arrow keys?

Hello. I am making a 2D shooter with an over head camera (the game is along the ZX plane if that helps). I want to make it so that when the arrow keys (or IJKL) are held down, a projectile will move outward from the player object in the direction that was pressed, how would I do that? Also, I am using WASD for another type of control (character movement), so how would I need to change around the input settings? Thank you

if you give me some script and problems i will try to help you…