is there a way to go back to this line of code to check for input again?:

```
say=raw_input("say: ")

```

after i do a if statement to check what the user inputed:

```
if say == "hello":
    do something

```

It does the if statement but then It ends the program and i have to run it again.I really don't want to have to start the file back up again. How do i make it where it goes back to that line of code to check for another input i enter.