For the following code, what is the output?
The output of the code is `5`. The value of `y` is passed to the `increment()` function, which adds `1` to it and returns the new value of `x`. This value is then assigned to `y`, so the final value of `y` is `5`.
def increment(x):
    x += 1
    return x
y = 4
y = increment(y)
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
For the following code, what is the output?

### Input:
def increment(x):
    x += 1
    return x
y = 4
y = increment(y)

### Response:
The output of the code is `5`. The value of `y` is passed to the `increment()` function, which adds `1` to it and returns the new value of `x`. This value is then assigned to `y`, so the final value of `y` is `5`.