#Aufgabe Nr. 1
line 1,2: def sum(a, b):
             return (a + b)
= -the sum function takes two parameters, a and b
  -inside of the function, it calculates the sum of a and b by using the operatort +

line 3,4: a = int(input('Enter 1st number: '))
          b = int(input('Enter 2nd number: '))
= - input tells the user to enters two numbers,a and b 
  - the reusult get stored in the variable in a and b   

line 5: print(f'Sum of {a} and {b} is {sum(a, b)}')
= - the sum function is called with a and b as arguments
  - the result is nembedded into a formatted string
  - the string prints the result