VTU Computer Programming Lab in "Python"

1) 

""" python program to Design and develop a flowchart or an algorithm that takes three coefficients (a, b, and c) of a Quadratic equation (ax^2 +bx+c=0) as input and compute all possible roots. Implement a Python program for the developed flowchart/algorithm and execute the same to output the possible
roots for a given set of coefficients with appropriate messages.find two roots of a quadratic equation """

a=float(input("enter value of a:"))

b=float(input("enter value of b:"))

c=float(input("enter value of c:"))

disc=(b*b)-(4*a*c)

if (disc==0):

r1=r2=-b/(2*a)

print "roots are equal:",r1

elif (disc >0):

print "roots are not equal"

r1=(-b+(disc**0.5))/(2*a)

r2=(-b-(disc**0.5))/(2*a)

print "root1:",r1

print "root2:",r2

else:

print "roots are imaginary"

r=-b/(2*a)

i1=(abs(disc)**0.5)/(2*a)

i2=(abs(disc)**0.5)/(2*a)

print "root1:"+str(r)+"+i"+str(i1)

      print "root2:"+str(r)+"-i"+str(i2)


OUTPUT:

2)

"""Design and develop an algorithm to find the reverse of an integer number NUM and check whether it is PALINDROME or NOT. Implement a C program for the developed algorithm that takes an integer number as input and output the reverse of the same with suitable messages. Ex: Num: 2014, Reverse: 4102, Not a Palindrome"""

a=int(input("enter an interger value :"))

temp=a

rev=0

while (a>0):

rem=a%10

a=a/10

rev=rev * 10+rem

print "entered number is: %d\nreversed number is: %d" %(temp,rev)

if(temp==rev):

print "\"%d in a PALINDROME\"" %temp

else:

       print "\"%d in a NOT A PALINDROME\"" %temp


OUTPUT:

3)

"""Design and develop a C program to read a year as an input and find whether it is leap year or not. Also consider end of the centuries."""


year=int(input("enter a year:"))

if (((year%4==0) or (year%100==0)) or (year%400==0)):
    print "entered year %d is a LEAP YEAR" %year
else:
     print "entered year %d is a NOT A LEAP YEAR" %year

OUTPUT: 

4)

"""Factorial of any number between 0 to 989 using Recursive function"""
 
num=int(input("enter a integer number:"))

def fact(f):
    "this function computes factorial" #optional function description
    if f==0:
        return 1
    else:
        return f*fact(f-1)

i=0
while(i<=num):

    res=fact(i)
    print "Factorial("+str(i)+")="+str(res)
    i=i+1
     
OUTPUT: