Zybooks 6.18 LAB: Track laps to miles

Question

So I have written the code correctly for this problem, but I don't understand a part of the code that was already present as a requirement to use. What does this part of the code do?: if __name__ == '__main__':

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The problem prompt is:

One lap around a standard high-school running track is exactly 0.25 miles. Define a function named laps_to_miles that takes a number of laps as a parameter, and returns the number of miles. Then, write a main program that takes a number of laps as an input, calls function laps_to_miles() to calculate the number of miles, and outputs the number of miles.

Output each floating-point value with two digits after the decimal point, which can be achieved as follows: print(f'{your_value:.2f}')

Ex: If the input is: 7.6 --> the output is: 1.90

Ex: If the input is: 2.2 --> the output is: 0.55

The program must define and call the following function: def laps_to_miles(user_laps)

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My code is:

def laps_to_miles(user_laps):
    user_miles = user_laps*0.25
    return user_miles
    
if __name__ == '__main__':
    user_laps = float(input())
    print(f'{laps_to_miles(user_laps):.2f}')

Answer 1

def miles_to_laps(user_miles):
    miles_to_laps = user_miles *4
    return miles_to_laps

if __name__ == '__main__':  
    user_miles = float(input())
    print(f'{laps_to_miles(user_laps):.2f}')

Answer 2

def laps_to_miles(user_laps):
    user_miles = user_laps*4
    return user_miles
def miles_to_laps(user_miles):
    miles_to_laps = user_miles *4
    return miles_to_laps
    
if __name__ == '__main__':
    user_laps = float(input())
    print(f'{laps_to_miles(user_laps):.2f}')