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# Questions

* Why should we use functions in our programs?
* True or False, the function below is incorrect because the variable name used

  within the function is different than the variable name defined outside.

```python
def launch(item):
  print("item launched: %s".format(item))

missile = 'warhead'
launch(missile)
```

* True or False, even functions with no return statement return a value?
* Write a function that combines two strings and returns the result.
* How could you rewrite the following code using a function?

```python
hole = None
if peg_type == 'round':
  print('the type supplied is round')
  hole = 'round'
elif peg_type == 'square':
  print('the type supplied is square')
  hole = 'square'
```

* True or False, when calling a function, the order in which you supply

  arguments (the values you are giving to the function in parentheses) is

  critical?
* Give an example of overriding scope.
* How can you recover from a fatal error on your program?
* Give an example of handling an `IndexError`.
* Why would we care to write our data to a file?
* How can I open a file in read/write mode?
* What would I do if I wanted to read a file one line at a time?