Simple calculator

print('My  super  calculator')
print('Ruslan  Isaev  2016')
function loop()
print('first  number')
first=io.read()
print('second  number')
second=io.read()
print('What  to  do  with them')
op=io.read()
print('RESULT:')
if(op=='+') then
  print(first+second)
end
if(op=='-') then
  print(first-second)
end
if(op=='*') then
  print(first*second)
end
if(op=='/') then
  print(first/second)
end
if(op=='^') then
  print(first^second)
end
loop()--When  function  ended  do  it  again
end
loop()--At  start