I need help understanding the first line!
def chest_size(size):
if size >= 83 and size <= 88:
return "S"
elif size >= 89 and size <= 94:
return "M"
elif size >= 95 and size <= 101:
return "L"
elif size >= 102 and size <= 109:
return "XL"
else: return "Sorry we don’t have your size"
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