input: Write a function to convert the given temperature from Celsius to Fahrenheit. The function should take in the temperature in Celsius as an input and return the temperature in Fahrenheit.
  
  def celsius_to_fahrenheit(celsius):
      fahrenheit = (celsius * 9/5) + 32
      return fahrenheit
  
  assert celsius_to_fahrenheit(0)==32
  assert celsius_to_fahrenheit(-40)==-40
  assert celsius_to_fahrenheit(100)==212
  assert celsius_to_fahrenheit(25)==77
  assert celsius_to_fahrenheit(37)==98.6
output: def celsius_to_fahrenheit(celsius):
      fahrenheit = (celsius * 9/5) + 32
      return fahrenheit