Different line joinings in pyton

bmi.py

#!/usr/bin/python3

def output():
  # explicit line joining with backslash (prefered for simple strings)
  print("let's do some calculations \
of the body mass index")
  # explicit line joining with operator # generally prefered, allows to keep indentation consistent
  # PEP 8 recommends operator on the next line
  print(f"weight: 75, size: 1.77 "
  + f"bmi: {bmi_calc(75,1.77)}")
  

# implicit line joining
# Expressions in parentheses, square brackets or curly braces 
# can be split over more than one physical line without using backslashes
def bmi_calc(weight, 
height):
  return weight / height**2

output()