# Calculate the Sum of the two lowest positive integers in Python

## The challenge

Create a function that returns the sum of the two lowest positive numbers given an array of minimum 4 positive integers. No floats or non-positive integers will be passed.

For example, when an array is passed like `[19, 5, 42, 2, 77]`

, the output should be `7`

.

`[10, 343445353, 3453445, 3453545353453]`

should return `3453455`

.

## The solution in Python code

Option 1:

```
def sum_two_smallest_numbers(numbers):
return sum(sorted(numbers)[:2])
```

Option 2:

```
def sum_two_smallest_numbers(num_list):
num_list.sort()
return num_list[0] + num_list[1]
```

Option 3:

```
sum_two_smallest_numbers = lambda A: sum( sorted( filter( lambda x:x>0, A) )[:2] )
```

## Test cases to validate our solution

```
import test
from solution import sum_two_smallest_numbers
@test.describe("Fixed Tests")
def fixed_tests():
@test.it('Basic Test Cases')
def basic_test_cases():
test.assert_equals(sum_two_smallest_numbers([5, 8, 12, 18, 22]), 13)
test.assert_equals(sum_two_smallest_numbers([7, 15, 12, 18, 22]), 19)
test.assert_equals(sum_two_smallest_numbers([25, 42, 12, 18, 22]), 30)
```