alive

Returns the boolean if the UNIT is alive, otherwise false.

alive([UnitId]) : boolean
alive([UnitId]) : boolean

1. See Wowpedia for more information on WoW Unit IDs. Will default to 'player' if nothing is specified as an argument.

Example

if alive('target') then 
  return cast(Frostbolt, 'target')
end
if alive('target') then 
  return cast(Frostbolt, 'target')
end 

Note

This uses UnitIsDeadOrGhost(unit), returning boolean.