Sure, here is a simple way to check if two lists have at least one common element in Python:

```python
def common_element(list1, list2):
# Use set() function to remove duplicates from lists
set1 = set(list1)
set2 = set(list2)

# Use & operator to find common elements between sets
if (set1 & set2):
print("Two lists have at least one common element")
else:
print("Two lists have no common element")

# Test the function
a = [1, 2, 3, 4, 5]
b = [5, 6, 7, 8, 9]
common_element(a, b)
```

In this code, we first convert the lists to sets using the `set()` function. This is because sets, unlike lists, cannot have duplicate elements, so this step effectively removes any duplicates from our lists.

Then, we use the `&` operator, which in Python returns the intersection of two sets (i.e., the elements that are common to both). If the intersection of `set1` and `set2` is not empty, that means the two lists have at least one common element, so we print a message saying so. If the intersection is empty, that means the two lists have no common elements, so we print a different message.

Question

Sure, here is a simple way to check if two lists have at least one common element in Python:

```python
def common_element(list1, list2):
    # Use set() function to remove duplicates from lists
    set1 = set(list1)
    set2 = set(list2)

# Use & operator to find common elements between sets
    if (set1 & set2):
        print("Two lists have at least one common element")
    else:
        print("Two lists have no common element")

# Test the function
a = [1, 2, 3, 4, 5]
b = [5, 6, 7, 8, 9]
common_element(a, b)
```

In this code, we first convert the lists to sets using the `set()` function. This is because sets, unlike lists, cannot have duplicate elements, so this step effectively removes any duplicates from our lists.

Then, we use the `&` operator, which in Python returns the intersection of two sets (i.e., the elements that are common to both). If the intersection of `set1` and `set2` is not empty, that means the two lists have at least one common element, so we print a message saying so. If the intersection is empty, that means the two lists have no common elements, so we print a different message.

Knowee AI · Accepted Answer

Sure, here is a simple way to check if two lists have at least one common element in Python:

```python
def common_element(list1, list2):
    # Use set() function to remove duplicates from lists
    set1 = set(list1)
    set2 = set(list2)

# Use & operator to find common elements between sets
    if (set1 & set2):
        print("Two lists have at least one common element")
    else:
        print("Two lists have no common element")

# Test the function
a = [1, 2, 3, 4, 5]
b = [5, 6, 7, 8, 9]
common_element(a, b)
```

In this code, we first convert the lists to sets using the `set()` function. This is because sets, unlike lists, cannot have duplicate elements, so this step effectively removes any duplicates from our lists.

Then, we use the `&` operator, which in Python returns the intersection of two sets (i.e., the elements that are common to both). If the intersection of `set1` and `set2` is not empty, that means the two lists have at least one common element, so we print a message saying so. If the intersection is empty, that means the two lists have no common elements, so we print a different message.

Common elementGiven two lists a, b. Check if two lists have at least one element common in them.

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