#### Sum of Even Integers in a List

The function should take a list of integers as input and return the sum of the even integers in the list.

#### Problem

```Given a list of integers, write a function that returns the sum of the even integers in the list.
Example input: [1, 2, 3, 4, 5]
Example output: 6```

#### Solution

This solution is in Python. Our A.I. can create solutions in multiple languages.
```def sum_even(lst):
return sum(x for x in lst if x % 2 == 0)

# This solution is optimal because it uses a generator expression to filter the list and sum the even numbers.
# This is optimal because it is a single pass through the list, and it does not require any additional memory.
# It is also very readable.```

A.I. Evaluation of the Solution

This solution is optimal because it uses a generator expression to filter the list and sum the even numbers. This is optimal because it is a single pass through the list, and it does not require any additional memory. It is also very readable.

Evaluated at: 2023-01-28 04:15:35