I want to know how I could make a sprite jump.

If you want realistic-looking jumping, you might want to use these scripts:

when green flag clicked
set [yvel v] to [0]
forever
change [yvel v] by (-1)
change y by (yvel)
if <touching [ground v] ?> then
change y by ((-1) * (yvel))
set [yvel v] to [0]
end
if <<key [space v] pressed?> and <(yvel) = [0]>> then
set [yvel v] to [12]
end
end

Keep in mind that these are only the very basic scripts - they are by no means efficient or robust. They're the bare minimum. If you want to make a plaformer game or something like that, you should look at griffpatch's platformer tutorial, here: https://scratch.mit.edu/projects/67727504/ It's very in-depth and explanatory.

amylaser wrote:

If you want realistic-looking jumping, you might want to use these scripts:

when green flag clicked
set [yvel v] to [0]
forever
change [yvel v] by (-1)
change y by (yvel)
if <touching [ground v] ?> then
change y by ((-1) * (yvel))
set [yvel v] to [0]
end
if <<key [space v] pressed?> and <(yvel) = [0]>> then
set [yvel v] to [12]
end
end

Keep in mind that these are only the very basic scripts - they are by no means efficient or robust. They're the bare minimum. If you want to make a plaformer game or something like that, you should look at griffpatch's platformer tutorial, here: https://scratch.mit.edu/projects/67727504/ It's very in-depth and explanatory.

Realistic jumping? Let's keep this topic very simple. Instead of that hard realistic jumping, try this. But it may not fit your project needs. This needs no platform but only goes back to the same level of where the sprite was once before.

when green flag clicked//starts the script
forever//makes script go forever
  if <key[Up arrow v]pressed?> then// jump key
    repeat [10]//for realistic jump
    change y by [20]//makes sprite rise
    end
    repeat [10]//for realistic jump
    change y by [-20]//makes sprite fall
    end
  end
end