Simple Python Function

value_one = 10
value_two = 20
result = value_one + value_two
print "The result is equal to ", result

def AddTwoNumbers(first_value, second_value): # function definition called AddTwoNumbers and it takes 2 parameters - first_value and second value
    result = 0  #I declare a variable to hold onto the result of adding the 2 numbers
    result = first_value + second_value  #the 2 numbers that I passed as parameters are added together and the value is assigned to the variable result.
    return result  #finally I return the result to the where I called the function


myResult = AddTwoNumbers(10,20) # #This will call the function defined above and pass the number 10 and store it in first_value, and store 20 in second_value
print "The result = ", myResult #This will print the result

#Now I can call that function over and over again - functions make code reusable if we want to do some work multiple times

myResult = AddTwoNumbers(5, 6)
print "The result = ", myResult

myResult = AddTwoNumbers(15,98)
print "The result = ", myResult

myResult = AddTwoNumbers(6, 9)
print "The result = ", myResult