# Test 12: Sum check Given a list of numbers and a number k, write a Python program to check whether the sum of any two numbers from the list is equal to k or not. Sample data: ([12, 5, 0, 5], 10) ([20, 20, 4, 5], 40) ([1, -1], 0) ([1, 1, 0], 0) Sample output: True True True False

Here's a Python program that checks whether the sum of any two numbers from a given list is equal to a given number k or not:

def sum_check(lst, k):
    # Initialize a set to hold the values seen so far
    seen = set()
    
    # Iterate over the list of numbers
    for num in lst:
        # Check if the complement of the current number is in the set
        if k - num in seen:
            return True
        # Add the current number to the set
        seen.add(num)
    
    # If no pair of numbers was found, return False
    return False

# Test the function with the given sample data
data = [([12, 5, 0, 5], 10),
        ([20, 20, 4, 5], 40),
        ([1, -1], 0),
        ([1, 1, 0], 0)]

for lst, k in data:
    result = sum_check(lst, k)
    print(f"List: {lst}, k: {k}, Result: {result}")

Output:

List: [12, 5, 0, 5], k: 10, Result: True
List: [20, 20, 4, 5], k: 40, Result: True
List: [1, -1], k: 0, Result: True
List: [1, 1, 0], k: 0, Result: False

I hope this helps! Let me know if you have any more questions.