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# Need help with one line of the code

I don't understand why product =1 , why isnt it product = 0. What is the logic behind it

twoples.py
```def multiply(*args):
product = 1
for arg in args:
product *= arg
return product
```

MOD

In arithmetic, 1 is the multiplicative identity, whereas, 0 is the additive identity:

```n = 1 * n
n = 0 + n
```

That is,

```5 * 4 * 3 == 1 * 5 * 4 * 3
```

So, initializing the product to 1 will allow the loop to be seeded with a neutral starting value.

You could also initialize product to the first item in `*args` then loop over the remaining `args`:

```    product = args[0]
for arg in args[1:]:
product *= arg
return product
```

Because you are multiplying with product *= arg, the equivalent to product = product*arg. If product were initialized to 0 the result would always be 0.