Compare the two string based on ascii values

str1=raw_input('Enter the string 1:  ')
str2=raw_input('Enter the string 2:  ')
if str1==str2:
      print 'String are equal'  # It is working based on ascii value  refer http://www.ascii-code.com/
elif str1<str2:
      print 'Str2 is greater than str1'
elif str1>str2:
        print 'Str1 is greater than str2'
elif str1<=str2:
        print 'Str1 is greater than or equal to str2'
elif str1>=str2:
        print 'Str1 is greater than or equal to str2'
elif str1!=str2:
        print 'Str1 is not equal to str2'

Converting a for loop to corresponding while loop

for count in range(0,100,2):
   print 'For:',count

count1 =0
while(count1<100):
  print 'While:',count1
  count1=count1+2

Evaluating expression in Python

x=2
y=3
z=2

print x**y**z  #Answer 512

print (x**y)**z  #Answer 64

print x**(y**z)  #Answer 512

Perimeter and area of a circle and finding Natural Exponential Function

import math
r=int(raw_input('Enter the radius of circle:'))
perimeter=2*math.pi*r
print 'Perimeter of a circle :',perimeter
area=math.pi*(r**2)
print 'Area of acircle :',area

x=int(raw_input('Enter the value of x in y=e**x:'))
y=math.e**x
print 'Natural Exponential Function value :',y

Sorting the numbers in the List

L=int(raw_input("Enter the length of list: "))
p=list()
for i in range(L):
      num=int(raw_input("Enter the elements : "))
      p.append(num)
print '\nUnsorted list is: ',p
for i in range (len(p)):
 for j in range (i+1,len(p)):
  if p[i]>p[j]:
   t=p[i]
   p[i]=p[j]
   p[j]=t
else:
 print '\nSorted List is:' ,p