What is the use of this line. i am new for lua programming char lua : 

code=55
local convert=string.char(4,1,0,0,0,0,math.floor(224 + (code/16)), code % 16)
print(convert)


here-string.character inside using  (4,1,0,0,0,0,0) what is purpose this using. anyone have to answer please help me.
