Introduction
Function basics
More advanced concepts
Instruction
Good! Coming back to the previous example:
def calculate_price(weight, price_per_pound=1.5, tax=0.15): return weight * price_per_pound * (1+tax)
You may ask one more question: since optional arguments are assigned values from left to right, how can I invoke the function with explicit values for weight and tax, but not for price_per_pound?
The answer is simple: use argument names!
calculate_price(170, tax=0.89)
With this invocation, the values for the arguments would be: weight=170, price_per_pound=1.5 (default value), tax=0.89.
Exercise
Given a function named calculate_cone_area, invoke the function with r=5, h=3, and the default value of pi.
Stuck? Here's a hint!
Provide argument names when you invoke the function.
