Python Coding Challange - Question with Answer (01200825)

 

Let’s break it step by step.

val = 50
def foo(val=100):
    return val
print(foo())

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 Step 1: Global variable

• val = 50 creates a global variable.

• This val is available everywhere in the file, but inside a function, local variables take priority over global ones.

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 Step 2: Function definition

def foo(val=100): 
    return val

• Here, foo has a parameter val.

• The default value for this parameter is 100.

• This val shadows the global val (50) when used inside the function.

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 Step 3: Function call

print(foo())

• We call foo() without arguments.

• Since no argument is passed, Python uses the default value → val = 100.

• So the function returns 100.

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✅ Final Output:

100

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👉 Key learning:

• Default parameters in functions override global variables with the same name.

• The global val = 50 is ignored here.

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