pythonfunctiondefinition.txt

##FUNCTIONS

def sumProblem(x, y):
    sum = x + y
    sentence = 'The sum of {} and {} is {}.'.format(x, y, sum)
    print(sentence)

def main():
    sumProblem(2, 3)
    sumProblem(1234567890123, 535790269358)
    a = int(input("Enter an integer: "))
    b = int(input("Enter another integer: "))
    sumProblem(a, b)

main() 

#STRING FUNCTION
def lastFirst(firstName, lastName):
    separator = ', '
    result = lastName + separator + firstName
    return result

print(lastFirst('Benjamin', 'Franklin'))
print(lastFirst('Andrew', 'Harrington'))

#SCOPE _ LOCAL
def main():
    x = 3
    f()

def f():
    print(x)  # error: f does not know about the x defined in main

main()

#CORRECTING BAD SCOPE
def main():
    x = 3
    f(x)

def f(x):
    print(x)  

main()

#GLOBAL CONSTANTS
PI = 3.14159265358979   # global constant -- only place the value of PI is set

def circleArea(radius):
    return PI*radius*radius    # use value of global constant PI

def circleCircumference(radius):
    return 2*PI*radius         # use value of global constant PI

def main():
    print('circle area with radius 5:', circleArea(5))
    print('circumference with radius 5:', circleCircumference(5))

main()