how to define in python with a = code example

Example 1: python functions

# first we have to write 'def'
# then our function name followed by ()
# and a ':' abd defining  block of code

def multiply():     # naming convention could be same as variable for functions
    product = 10.5 * 4
    return product


product = multiply()
print(product)

Example 2: how to define functions in python

def add(number):
  equation = 5 + number
  print(equation)
  
 
add(10)

output:
  
  15