9.2.7: Replace a Letter

What the &*@#! I don't think I'm adequately prepared to do this.

Believe it or not, you actually do have the background necessary to accomplish this. You just may not realize that you do.

For starters, you'll need a new string. Because strings are immutable, you can't just change it in place. Therefore, you'll need to insert a line between 3 and 4 that starts with a variable name. For example:

new_string = __________________________

But how do you tell it what needs to go in that new string? Remember a few things you've learned. For starters, you know how to replace the string you want up to the index. You'll use code like this:

string[:index]

Think about what that does. It pulls the existing string up to the point of the value of the variable index. Since you already said to set it equal to a new variable (I called it new_string), it's going to save it.

But that's not enough. You need to add a dash at the value of the index. This part is fairly straightforward: concatenate a - into the string at that point.

Then, you need the rest of the string. Starting at the space after the index value (index+1), pull in the rest of the string and concatenate that onto the end. Like this:

[index+1:]

Don't forget to change the variable that gets returned!