Python Coding Challenge - Question with Answer (ID -240426)

 

Explanation:

🧩 Function Definition

def f(x, y=5): 

    return x + y

def is used to define a function named f.

The function takes two parameters:

x → required argument

y → optional argument with a default value of 5

return x + y means the function will output the sum of x and y.

▶️ First Function Call

print(f(3))

Only one argument (3) is passed.

So:

x = 3

y = 5 (default value is used)

Calculation:

3 + 5 = 8

Output:

8

▶️ Second Function Call

print(f(3, None))

Two arguments are passed:

x = 3

y = None (explicitly provided, so default is NOT used)

Now the function tries:

3 + None

⚠️ This causes an error because Python cannot add an integer and NoneType.

❌ Error Produced

TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'

Final Output:

Error