Batch BMI.

Third class. You have a list of weights. You want BMI for each — not one by one by hand, but in a batch.

The formula is familiar from Foundations: BMI = weight / height ** 2. Here height is fixed (1.8), and weight comes from each item in weights.

The pattern is: empty list bmis = [], loop for w in weights:, compute, append, print. append adds the result to the end of bmis so you keep every BMI in one place — not only print them.

Mini example:

height = 1.8
weights = [70.0, 72.0]
bmis = []
for w in weights:
    bmi = w / height ** 2
    bmis.append(bmi)
    print(round(bmi, 2))

round(..., 2) again helps readable output. The values inside bmis keep full precision.

Common mistake: forgetting append and overwriting one variable; writing height ** 2 as height * 2; looping over a number instead of the list.