[mineralo]

https://sampwiki.blast.hk/wiki/SetPlayerVelocity

pawn Код:

if (!strcmp("/jump", cmdtext))
    {
        new Float:x,Float:y,Float:z;
        GetPlayerPos(playerid,x,y,z)
    SetPlayerVelocity(playerid,x,y,(z+5)); //Forces the player to jump
    return 1;
    }

that you wanted?