Task:1
#Print Numbers
#Write a program to print numbers from 1 to 10 using a while loop.
def print_numbers(num):
no=1
while no<=num:
print(no,end=' ')
no+=1
print_numbers(10)
Output:
1 2 3 4 5 6 7 8 9 10
Task:2
#Sum of N Numbers
#Write a program to calculate the sum of the first NN natural numbers using a while loop.
def nat_num(N):
sum = 0
natural_no = 1
while natural_no <= N:
sum += natural_no
natural_no += 1
return sum
N = int(input("Enter the no: "))
print(nat_num(N))
Output:
Enter the no: 10
Sum of 10 natural numbers are 55
Task:3
#Find even numbers between 1 to 50
def even_number(num):
no=2
while no<=num:
print(no, end=" ")
no+=2
num=int(input("Enter the number: "))
even_number(num)
Output:
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50
Task:4
#Find odd numbers between 1 and NN
def odd_number(num):
no=1
while no<=num:
print(no, end=" ")
no+=2
num=int(input("Enter the number:"))
odd_number(num)
Output:
Enter the number:15
1 3 5 7 9 11 13 15
Task:5
#Multiplication table of number NN
#NN-2
no=1
while no<=10:
print(f'{no}*2={no*2}')
no+=1
Output:
1*2=2
2*2=4
3*2=6
4*2=8
5*2=10
6*2=12
7*2=14
8*2=16
9*2=18
10*2=20
Factorial:
Write a program to calculate the factorial of a given number using a while loop.
Case-1
no = 1
factorial = 1
factorial = factorial * no #1
no = no+1 #2
factorial = factorial * no #2
no = no+1 #3
factorial = factorial * no #6
no = no+1 #4
factorial = factorial * no #24
no = no+1 #5
factorial = factorial * no #120
print(factorial)
Case-2
def find_factorial(num):
no=1
factorial=1
while no<=num:
factorial=factorial*no
no+=1
return factorial
num=int(input("Enter the number:"))
print(find_factorial(num))
For scenarios output will be same
Output:
Enter the number:5
120
Sum of digits:
Find the sum of the digits of a given number (e.g., 123 → 1+2+3=61+2+3=6).
def sum_of_digits(num):
sum=0
while num>0:
sum=sum+num%10
num=num//10
return sum
num=int(input("Enter the number:"))
print(sum_of_digits(num))
Output:
Enter the number:123
6
Count Digits
To count the number of digits in a given number (e.g., 12345 → 5 digits).
def count_of_digits(no):
count=0
while no>0:
no=no//10
count+=1
return count
no=int(input("Enter the number:"))
print(count_of_digits(no))
Output:
Enter the number:12345
5
Reverse numbers
To reverse a number
def reverse_no(num):
reverse = 0
while num>0:
reverse = (reverse*10) + num%10
num = num//10
return reverse
print(reverse_no(1234))
Output:
Enter the number:12345
54321
Check Palindrome
check if a given number is a palindrome (e.g., 121 → palindrome, 123 → not a palindrome).
def palindrome(num):
count=0
while num>0:
count=count*10+num%10
num=num//10
return count
num=int(input("Enter the number:"))
result=palindrome(num)
if result==num:
print("Palindrome")
else:
print("Not palindrome")
Output:
Enter the number:121
Palindrome
Enter the number:123
Not palindrome
Find power
def find_power(base,power):
result=1
while power>=1:
result=result*base
power-=1
return result
base=int(input("Enter the base number:"))
power=int(input("Enter the power number:"))
result=find_power(base,power)
print(result)
Output:
Enter the base number:5
Enter the power number:2
25
Armstrong Number
Example:
def count_of_digits(num):
count=0
while num>0:
num=num//10
count+=1
return count
def find_power(base,power):
result=1
while power>=1:
result=result*base
power-=1
return result
def find_armstrong(num):
armstrong=0
while num>0:
rem=num%10
result= find_power(rem,count)
armstrong=armstrong+result
num=num//10
return armstrong
num=int(input("Enter the number:"))
count=count_of_digits(num)
armstrong_result=find_armstrong(num)
if armstrong_result==num:
print("Armstrong")
else:
print("Not armstrong")
Output:
Enter the number:135
Not armstrong
Enter the number:153
Armstrong
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