gistfile1.js

function
sum
(
)
{
for
(
var
i
=
0
,
len
=
arguments
.
length
,
sum
=
0
;
i
<
len
;
i
+=
1
)
sum
+=
arguments
[
i
]
return sum
}
console
.
log
(
sum
(
1
,
2
,
3
)
)