Python Lab Manual Answers (22616) Practical 5

 Python Lab Manual (22616)

Practical 5 : Write Python Program to demonstrate  use of looping statements : 'While ' Loop ,'for' Loop, and Nested loop.

*Practical Related Questions.

1) 1. What would be the output from the following Python code segment?

x=10

while x>5:

 print x,

 x-=1

Ans=>  SyntaxError: Missing parentheses in call to 'print'. Did you mean print(x, end=" ")?

2. Change the following Python code from using a while loop to for loop:

x=1

while x<10:

 print x

 x+=1

Ans=> for x in range(1,10)

                print(x)

*Exercise 

1) Print the following patterns using loop:

a. *

    **

    ***

    ****

Ans =>

for i in range(0,5):

    for j in range(0,i+1):

        print("*",end="")

    print("")

 

b.

     *

   ***

 *****

   ***

     *

Ans =>

for i in range(3):

    print(' '*(3-i-1)+'*'*(2*i+1))

for j in reversed(range(2)):

    print(' '*(2-j)+'*'*(2*j+1))

101010110101011010101

c.

1010101

 10101

   101

     1 

Ans =>

i=3

k=0

while(i>=0):

    a=" "*k+"10"*i+"1"

    print(a)

    i=i-1

    k=k+1

2. Write a Python program to print all even numbers between 1 to 100 using while 

loop.

Ans =>

i = 2

while i <= 100:

  if i%2==0:

   print(i)

  i += 1

3. Write a Python program to find the sum of first 10 natural numbers using for loop.

Ans =>

sum = 0

n = 10

while(n >= 0):

    sum=sum+n

    n=n-1

print("Sum of first 10 natural number : ",sum)

4. Write a Python program to print Fibonacci series.

Ans =>

num=int(input("Enter terms : "))

x=0

y=1

c=2

print("Fibonacci sequence is : ")

print(x)

print(y)

while(c<num):

    z=x+y

    print(z)

    x=y=z

    c+=1

5. Write a Python program to calculate factorial of a number

Ans =>

n = int(input("Enter a number : "))

factorial = 1

if n >= 1 :

    for i in range(1,n+1):

        factorial = factorial * i

print("Factorial : ",factorial)

6. Write a Python Program to Reverse a Given Number

Ans =>

n = int(input("Enter a number : "))

rev = 0

while(n>0):

    dig=n%10

    rev=rev*10+dig

    n=n//10

print("Reverse of the number : ",rev)

7. Write a Python program takes in a number and finds the sum of digits in a 

number.

Ans =>

n = int(input("Enter a number : "))

sum = 0

for digit in str(n):

    sum=sum+int(digit)

print("Sum of the number : ",sum)

8. Write a Python program that takes a number and checks whether it is a palindrome 

or not

Ans =>

n = int(input("Enter number:"))

temp=n

rev=0

while(n>0):

    dig=n%10

    rev=rev*10+dig

    n=n//10

if(temp==rev):

    print("Palindrome Number!")

else:

    print("Not Palindrome Number!")