Q.State True or False: While defining a function in Python, the positional parameters in the function header must always be written after the default parameters.

The key idea here is the order of parameters in a Python function definition.

In Python, parameters without default values (which are typically positional-or-keyword parameters) must always precede parameters with default values. This is because once a default value is provided for a parameter, all subsequent parameters must also have default values. Placing a non-default (positional) parameter after a default parameter would create an ambiguity for the interpreter regarding argument assignment. Attempting to define a function like def func(a=1, b): will result in a SyntaxError. …

Concept

When a function is called, Python matches arguments to parameters from left to right. A parameter with a default value is optional, while a plain positional parameter is mandatory. If a mandatory parameter came after an optional one, Python could not tell whether a single supplied value was meant for the optional parameter or the mandatory one, so the language forbids that ordering.

Correct order

def calculate_area(length, width=10):   # valid: positional first, default after
    return length * width

Calling calculate_area(5) gives length=5, width=10; calculate_area(5, 20) gives length=5, width=20.

The order the statement claims …