how do I use the next line in the terminal?

how do I use the next line the the terminal on mac os,

for example when I'm using a for loop with many lines:

>>> for i in range(9)
>>>

when I use the enter button it executes the command and returns a styrax error.

I need it to be something like this:

>>> for i in range(9)
...  

I searched about it but couldn't find the answer to it, (I'm new to using the terminal)