January 2nd, 2013 
Jijo K Jose
Step 1
Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.
#!/usr/bin/python
#Author : Jijo K Jose
print "\n————————————\nChapter 16 – Functions \n————————————\n"
def sum_mul(a,b):
return a+b,a*b
c,d = sum_mul(10,20)
print "Sum = %d and Product = %d" %(c,d)
print"—————————————-"
#END
Step 2
Change file permission to executable using chmod command.
Step 3
Execute the python file.
