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# How to convert a list into a string?

#to convert a list into a string, we can use the <”.join()> method which joins all the elements into one and returns as a string.

'''

weekdays=['sun','mon','tues','wed','thus']

listAsString=''.join(weekdays)

print(listAsString)

'''

#Can you write a program to find the average of numbers in a list in Python?

'''

n=int(input("Enter the no. of element: "))

a=[]

for i in range(0,n):

elem=int(input("Enter element: "))

a.append(elem)

avg=sum(a)/n

print("avg of elements in the list",avg)

'''

#Write a program to reverse a number in Python?

'''

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

rev=0

while(n>0):

a=n%10

rev=rev*10+a

n=n//10

print(rev)

'''

#Write a program to find the sum of the digits of a number in Python?

'''

n=input("enter number: ")

sum=0

for i in n:

sum=sum+int(i)

print(sum)

'''

#Write a Python Program to Check if a Number is a Palindrome or not?

'''

num=input("Enter a numbers")

if num==num[::-1]:

print("yes, its a palindrome")

else:

print("No, its not a palindrome")

'''

#Write a Python Program to Count the Number of Digits in a Number?

'''

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

count=0

while(n>0):

count=count+1

n=n//10

print(count)

'''

#Write a Python Program to Print Table of a Given Number?

'''

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

for i in range(1,11):

print(n,'*',i,'=',n*i)

'''

#Write a Python Program to Check if a Number is a Prime Number?

'''

num=int(input("enter any number: "))

if num>1:

for i in range(2,num):

if num%i==0:

print(num,"is not a prime number")

break

else:

print(num,"is a prime number")

else:

print(num,"is not a prime number")

'''

#Write a Python Program to Check if a Number is an Armstrong Number?

'''

#take input N(string)

N=input("Enter a number: ")

digit_size=len(N) #find the size of N

sum_digit=0 #assign sum=0

for i in N: #go through each digit

digit=int(i) #convert to an integer

#raise it to number of digit.

#add it to our sum

sum_digit=sum_digit+(digit**digit_size)

if sum_digit==int(N):

print("Armstrong number")

else:

print("Not ArmStrong number")

'''

######

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

s=0

t=n

while t>0:

digit=t%10

s=s+digit**3

t//10

if n==s:

print(n,"is an armstrong number")

else:

print(n,"is not an armstrong number")

#1# To swap 2 numbers

a=10

b=20

#1. single statement

'''

a,b=b,a

print(a)

print(b)

'''

#2. using temporary variable

'''

temp=a

a=b

b=temp

print(a)

print(b)

'''

#2# Check number is prime or not.

'''

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

if num>1:

for i in range(2,num):

if num%i==0:

print(num,'is not a prime')

break

else:

print(num,'is prime')

else:

print(num,'is not prime')

'''

#3# find Factorial of a number

#fact=fact*i

#n=5 (1*2*3*4*5=120)

'''

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

fact=1

for i in range(1,num+1):

fact=fact*i

print(fact)

'''

#using function

'''

def fact(num):

if num==1:

return num

else:

return num*fact(num-1)

print(fact(4))

'''

#4# print Fibonacci series.

# ->each number is the sum of two preceding numbers.

# n1=1, n2=2, n3=n1+n2, n4=n2+n3

#0 1 1 2 3 5 8 13 21 34

'''

num=int(input("Enter any number: "))

n1=0

n2=1

print(n1)

print(n2)

for i in range(2,num):

sum=n1+n2

print(sum)

n1=n2

n2=sum

'''

#5#To print prime number between 100 and 200.

'''

for i in range(100,201):

if i>1:

for j in range(2,i):

if(i%j==0):

break

else:

print(i)

'''

'''

for num in range(100,200):

if all(num%i!=0 for i in range(2,num)):

print(num)

'''

#.Palindrome number

#is a number which reverse is same (12321,11911)

'''

num=input("Enter a number: ")

if num == num[::-1]:

print("yes, its a palindrome")

else:

print("No, its not a palindrome")

'''

#function

'''

def palindrome(num):

r_num=num[::-1]

if r_num==num:

print('Palindrome')

else:

print('not a paalindrome')

print(palindrome('madam'))

#print(palindrome('12321'))

'''

#ArmStrong number.

#example: 153 (3 digit)

#1^3 + 5^3 +3^3=1+125+27=153(same number)

#1.Approach

'''

1.Take input N(string)

2.find numbers of digit in N.

3.sum=0

4.go through each digit:

1.convert to an integer

2.raise it to number of digit

3.add it to our sum

5.check if sum==int(N):

1.ArmStrong

6.otherwise

not ArmStrong

'''

'''

N=input("Enter a number: ")

digit_size=len(N)

sum_digit=0

for i in N:

digit=int(i)

sum_digit=sum_digit+(digit**digit_size)

if sum_digit==int(N):

print("ArmStrong number")

else:

print("Not ArmStrong number")

'''

#1.Check number is Even or odd.

#logic->if number is divisible by 2 get reminder 0

# x%2==0 then number is Even.

# x%2!=0 then number is odd.

'''

x=int(input("enter a number: "))

if x%2==0:

print(x,"is even")

else:

print(x,"is odd")

'''

#2.check leap year

#logic-> leap year have 366 days in a year.

#februry have 29 days(1980,2004)

# x%400==0 (if year divisible by 400 the it is leap year.)

# x%4==0 or x%100!=0

'''

x=int(input("enter a number: "))

#result="Leap year" if x%400==0 else "Leap year" if x%4==0 and x%100!=0 else "Not Leap year"

#print(result)

if x%400==0:

print(x, " is leap year")

elif x%4==0 and x%100!=0:

print(x,' is leap year')

else:

print(x,' is not leap year')

'''

#3.Add two numbers.

'''

first=int(input("enter first number: "))

second=int(input("enter second number: "))

sum=first+second

print("Sum of",first,"and",second,"is",sum)

'''

#4. Remove duplicates from a list of string.

'''

names=[]

n=int(input("How many string you want: "))

for i in range(n):

print(i+1,"enter name")

names.append(input())

s=set(names)

for x in s:

print(x)

'''

'''

string=['apple','banana','apple','cherry','banana']

s=set(string)

print(s)

'''

'''

string=['apple','banana','apple','cherry','banana']

for i in set(string):

print(i)

'''

#5. print first 10 natural number

#while loop

'''

i=1

while i<=10:

print(i,end=' ')

i+=1

'''

#for loop

'''

for i in range(1,11): # last value excluded

print(i,end=' ')

'''

#print([i for i in range(1,11)])

#6. print first 10 natural number in reverse order

'''

i=10

while i>=1:

print(i,end=' ')

i-=1

'''

'''

for i in range(10,0,-1):

print(i,end=' ')

'''

#7. reverse a tuple

#tuple-immutable so we cant not perform reverse operation.

'''

t=eval(input("enter numbers separated by commas: "))

print("user entered tuple is",t)

l=list(t)

l.reverse() #l[::-1]

t=tuple(l)

print("Reverse of tuple is",t)

'''

#8. print indices(index) of all occurrence of given element in a given list.

#l=[1,2,3,1,1,2,3,1]

#element=1 [occure in index-0,3,4,7]

'''

lst=[1,2,3,1,4,2,1]

element=int(input("Enter element value: "))

index=0

while index<len(lst):

if lst[index]==element:

print(index,end=' ')

index+=1

'''

#9.single line function to calculate factorial.

#lambda(anonymus) function used to make program in a single line

#f=lambda n: n*f(n-1) if n>0 else 1

#f(5)

#10. To calculate area of a circle

'''

r=int(input("enter radius of a circle: "))

a=3.14*r**2

print("Area of circle is ",a)

'''

#11.Recursive function to calculate sum of square

# of squares of first N natural number.

#n=5 ->1^2+2^2+3^2+4^2+5^2

# =1+4+9+16+25=55

#12.Reverse a string

#slicing operator

'''

s=input("Enter a string: ")

print(s[::-1])

'''

#13. print table of 5.

'''

for i in range(1,11):

table=5*i

print(5,'*',i,'=',table)

#take input from user

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

for i in range(1,11):

table=num*i

print(num,'*',i,'=',table)

'''

#14.Calculate simple interest.

#simple interest=principle*rate*time/100

'''

p=float(input("Enter principle amount: "))

r=float(input("Enter rate of interest: "))

t=float(input("enter time: "))

si=p*r*t/100

print("Simple Interest is",si)

'''

#15. check whether a number is divisible by 5 or not.

'''

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

if num%5==0:

print(num," is divisible by 5")

else:

print(num," is not divisile by 5")

'''

#16. check given number is positive,negative or zero.

'''

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

if num<0:

print(num,"is negative")

elif num==0:

print(num,"is zero")

else:

print(num,"is positive")

'''

#17. print first 10 odd natural number.

#num%2!=0 (odd number=1,3,5,7,9...)

'''

for i in range(1,20,2):

print(i,end=' ')

'''

'''

for i in range(1,20):

if i%2!=0:

print(i,end=' ')

'''

#18.print first 10 even numbers.

#even nnumbers=2,4,6,8,10..

'''

for num in range(1,20):

if num%2==0:

print(num,end=' ')

'''

#19. first N natural numbers.

#natural number= 1-9

'''

num=int(input("enter number: "))

i=1

while i<=num:

print(i,end=' ')

i+=1

'''

#20.check prime numbers.

#prime numbers = natural number

#it have two factor

#it is divisible by 1 or itself ex-11(1,11)

'''

num=int(input("enter a number: "))

if num<2:

print("Not a prime")

else:

for i in range(2,num):

if num%i==0:

print("not a prime")

break

else:

print("Number is Prime")

'''

#21. calculate volumne of a cuboid.

'''

print("Enter length,breadth and height of a cuboid")

l,b,h=float(input("Enter length:")),float(input("Enter breadth: ")),float(input("Enter height: "))

v=l*b*h

print("Volumn of cuboid: ",v)

'''

#22.first N Natural numbers in reverse order.

'''

num=int(input("enter a natural number: "))

while num:

print(num,end=' ')

num=num-1

'''

#23. first N odd natural numbers in reverse order.

'''

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

for i in range(2*n-1,0,-2):

print(i,end=' ')

'''

#24. first N even natural number in reverse order.

'''

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

for i in range(2*n,0,-2):

print(i,end=' ')

'''

#25. sort a list given by user.

#l=[10,5,4,9,7]

#l=[4,5,7,9,10]

'''

l=[10,9,3,5,2,1,7]

print(sorted(l))

'''