To use try except for error handling

try:
      s=0
      g=s/0   # Division by zero creates error
      print 'Value of g :',g

except:
      print 'Something went wrong.'



try:
      s=0
      g=s/10   # Division by zero by 10  creates no error
      print 'Value of g :',g

except:
      print 'Something went wrong.'

Decimal Number to Binary number conversion

n=int(raw_input('Enter the Number'))
h=" "
while n>0:
  n1=n%2
  print 'R',n1
  n=n/2
  print 'V=',n
  h=h+str(n1)
print 'Binary Number is:',h[::-1]
 

Binary Number to Decimal Conversion

k=int(raw_input('Enter the binary number:'))
b=k
c=0
while b>0:
  b=b/10
  c=c+1
print c  
n=0
sum=0
while n<c:
  r=k%10
  k=k/10
  sum=sum + (r*(2**n))
  n=n+1
print 'Decimal Number is:', sum

Trigonometric Functions

import math
d=int(raw_input('Enter the angle in degree:'))
x= math.radians(d)
print 'Corresponding Radians is:',x           #Converts angle from degrees to radians.
f1=math.acos(x)                                                          # Return the arc cosine of x
print 'acos',f1
f2=math.asin(x)                                                           #Return the arc sine of x
print 'asin',f2
f3=math.atan(x)                                                          #Return the arc tangent of x
print 'atan',f3
f4=math.cos(x)                                                            #Return the cosine of x
print 'cos',f4
f5=math.sin(x)                                                             #Return the sine of x
print 'sin',f5
f6= math.tan(x)                                                            # Return the tangent of x
print 'tan',f6

u=int(raw_input('Enter the value of x:'))
v=int(raw_input('Enter the value of y:'))
e=math.hypot(u, v)                                                 #Return the Euclidean norm, sqrt(u*u + v*v)
print 'The Euclidean norm:',e

Accessing Values in Strings and Updating

var = 'Python Programming'
print "var[0]: ", var[0]
print "var[3:9]: ", var[3:9]
print "var[1:5]: ", var[1:5]
print "var[:]: ", var[:]           # List all elements in string
print "var[:2]: ", var[:2]       # List first 2 elements in string
print "var[2:]: ", var[2:]      # Except first 2 elements in string
print "var[::-1]: ", var[::-1]  # String Reverse
j=len(var)
print 'Length of string is:',j
i=0
while i<j:
      print 'Character in the string is:', var[i]
      i=i+1

x = 'Hello World!'

print "Updated String :- ", 'New ' + x[6:12]