# Example code for Day 12 Lecture, CS 111 Spring 2014

# return vs. print
def foo():
    return "hello, I'm a string in foo!"

def bar():
    print "hello, I'm a string in bar!"

s1 = foo()
s2 = bar()

print "s1: ", s1
print "s2: ", s2


# Calling a function from a function defined earlier
def foo():
    wuz = bar("hello")
    return 5 + wuz

def bar(ack):
    r = len(ack) / 10.0
    for i in range(len(ack)):
        r = (r**0.5) % 1.0
    return r

zug = foo()
print type(zug)
print zug


# Multiple arguments
def greet(name, repeats):
    for i in range(repeats):
        print "Hello %s!" % name


# Default argument values
def greet(name, repeats=1):
    for i in range(repeats):
        print "Hello %s!" % name


# Scoping (shadowing)
def xPlusOne(x):
    return x + 1

x = 6
y = xPlusOne(28)
print x, y


# Can't modify arguments!
def addOneToX(x):
    print "In the function, x is", x
    x = x + 1
    print "In the function, after modifying, x is", x

x = 6
print "Before the function call, x is", x
addOneToX(x)
print "After the function call, x is", x