# Blocks in python:

# As seen earlier, python uses blocks (indentation) for loops and if else

# functions are the same. In general, python blocks are formatted as follows:

# <block keywoard> <block name>(arg1, arg2, ...) :

# Where

# <block keyword>: keyword like "if", "while", "for", "def"

# <block name> : For functions, it'll be function name."if", "while" etc.

# don't need it

# () : Mandatory round braces

def default_greeting():

print "Hello from myfunction!"

def user_greeting(username, greeting):

# print message # Even though "message" doesn't exist, no error will be

# thrown, until this function is called

print username + " says " + "\"" + greeting + "\""

def add(arg1, arg2):

return arg1 + arg2

# How to call a function?

# is the round braces necessary?

# Yes, without round braces, nothing will happen.

# This is like declaring a variable

default_greeting

# print default greeting

default_greeting()

# print user greeting

user_greeting("Swapnil", "Welcome fall!")

# Make use for return value

answer = add(2, 3)

print "The answer is: " + str(answer)

#Exercise

#In this exercise you'll use an existing function, and while adding your own to

# create a fully functional program.

# Add a function named list_benefits() that returns the following list of

# strings: "More organized code", "More readable code", "Easier code reuse",

# "Allowing programmers to share and connect code together"

# Add a function named build_sentence(info) which receives a single argument

# containing a string and returns a sentence starting with the given string and

# ending with the string " is a benefit of functions!"

# Run and see all the functions work together!

def list_benefits():

return [ "More organized code",

"More readable code",

"Easier code reuse",

"Allowing programmers to share and connect code together"

];

def build_sentence(info):

print info + " is a benefit of functions"

benefits = list_benefits()

for this_benefit in benefits:

build_sentence(this_benefit)