#program to print 1 to 100 numbers
n = 100

primenumbers = [ ]
for i in range(2,100):
for j in range(2,i):
if (i%j==0):
break
else:
print(i)
primenumbers.append(i)
print("the prime numbers 1 to 100 is ",len(primenumbers))

#program to reverse a string
name = input('Enter a name : ')
print('Entered name is:',name)
#suresh
#us
#hserus
#print(name[::-1])

reverse = ""
for i in name:
reverse = i + reverse

print('Reversed value of {} is {}'.format(name,reverse))

#program to check whether a string is palindrome or not
name = input('Enter a string/name: ')
print()
print('orignal string: ',name)
print()
reversedValue = name[::-1]
print()
print('reversed string: ',reversedValue)
print()
if(name==reversedValue):
print('it is palindrome')
else:
print('it is not a palindrome')

#program for factorial of a number

n = int(input('Enter n valu : '))

if(n<0):
print('invalid number')
elif(n==0):
print('factorial of 0 is 1')
else:
mul=1
#1*2, 2*3, 6
#1*2*3*4*5
for i in range(1,n+1):
mul = mul * i

print('Factorial of {} is {}'.format(n,mul))

#program to print 1 to 2000 armstrong numbers


n=2000
for num in range(1,n+1):
order=len(str(num))
sum=0
temp=num
while temp>0:
digit=temp%10
sum+=digit**order
temp//=10
if(num==sum):
print(num)