Program to check the Perfect Number or Not

num=input("Enter the number:")
i=1
while i<=num/2:
 s=i**2
 if s==num:
  print "perfect square"
  break
 i+=1
else:
 print "Not a perfect square"

Program to find even number using functions without return

def even(n):
      if  n%2==0:
            print 'Even number'
      else:
            print 'Odd Number'

n=int(raw_input('Enter the number to check even or not:'))
even(n)  # No return from function but the message is displayed inside the function itself

Simple Calculator using functions

def su(a,b):  
      c=a+b
      print 'Added value is:',c
     
def subt(a,b):
            if a>b:
                  c=a-b
                  print 'Subtracted value is:',c
            else:
                  c=b-a
                  print 'Subtracted value is:',c
                  
def mul(a,b):
      c=a*b
      print 'Multiplication value is:',c

def div(a,b):
      if b==0:         
            print 'Division by zero not defined'
      else:
            c=float(a)/b
            print 'Divison value is:',c

def exp(a,b):
      c=a**b
      print 'Exponent value is:',c


a=int(raw_input('Enter the value of a:'))
b=int(raw_input('Enter the value of b:'))
print ' 1. add  2.sub  3.mul  4. div  5.exp'
n=int(raw_input('Enter the choice:'))
if n==1:
      su(a,b)        # Function call
elif n==2:
      subt(a,b)    # Function call
elif n==3:
      mul(a,b)          # Function call
elif n==4:
      div(a,b)    # Function call
elif n==5:
      exp(a,b)    # Function call
else:
      print 'Invalid options'

Sum of digits of the a given number

n=int(raw_input('Enter the number: '))
sum=0
while n>0:
      rem=n%10
      sum=sum+rem
      n=n/10
print 'Sum of digits of the number is: ',sum

Car Class Program

# define the Vehicle class
class Vehicle:
    name = ""              # initial value setting inisde the clas iteself
    kind = "car"           # initial value setting inisde the clas iteself
    color = ""             # initial value setting inisde the clas iteself
    value = 100.00         # initial value setting inisde the clas iteself
    def description(self): # creating function inside the class amd return as string
        desc_str = "%s is a %s %s worth $%.2f." % (self.name, self.color, self.kind, self.value)
        return desc_str
     
     
car= Vehicle()             # creates a object [car1] for class vehicle
print car.description()    # using created object calling the function inside class


car1 = Vehicle()           # creates a object car for class vehicle
car1.name = "Fer"          # using object[car1] variables on the class vehicle is assigned
car1.color = "red"         # using object[car1] variables on the class vehicle is assigned
car1.kind = "convertible"  # using object[car1] variables on the class vehicle is assigned
car1.value = 60000.00      # using object[car1] variables on the class vehicle is assigned

car2 = Vehicle()
car2.name = "Jump"
car2.color = "blue"
car2.kind = "van"
car2.value = 10000.00

print car.description()    # Using object [car] created calling the functions[description()]inside the class
print car1.description()   # Using object [car1] created calling the functions[description()]inside the class
print car2.description()   # Using object [car2] created calling the functions[description()]inside the class