1.
Print numbers from 1 to 10 using a for loop
for i in range(1,
11):
print(i)
2.
Print numbers from 1 to 10 using a while loop
i = 1
while i <= 10:
print(i)
i += 1
3.
Print the first 10 natural numbers in reverse order
for i in range(10,
0, -1):
print(i)
4.
Sum of numbers from 1 to 100
total = 0
for i in range(1,
101):
total += i
print("Sum:",
total)
5.
Print even numbers between 1 and 20
for i in range(2,
21, 2):
print(i)
6.
Find the sum of even numbers between 1 and 50
total = 0
for i in range(2,
51, 2):
total += i
print("Sum of
even numbers between 1 and 50:", total)
7.
Calculate the sum of all odd numbers from 1 to 100
total = 0
for i in range(1,
101, 2):
total += i
print("Sum of
odd numbers between 1 and 100:", total)
8.
Sum of the first n natural numbers
n =
int(input("Enter a number: "))
total =
sum(range(1, n + 1))
print(f"Sum
of the first {n} natural numbers is {total}")
9.
Find the sum of numbers divisible by 3 and 5 between 1
and 100
total = 0
for i in range(1,
101):
if i % 3 == 0 and i % 5 == 0:
total += i
print("Sum of
numbers divisible by 3 and 5 between 1 and 100:", total)
10. Print the first 10
multiples of a given number
num =
int(input("Enter a number: "))
for i in range(1,
11):
print(f"{num} x {i} = {num * i}")
11. Print the sum of
the first 20 even numbers
total = 0
for i in range(2,
41, 2):
total += i
print("Sum of
the first 20 even numbers:", total)
12. Print the
multiplication table of a number
num =
int(input("Enter a number: "))
for i in range(1,
11):
print(f"{num} x {i} = {num * i}")
13. Factorial of a
number using a for loop
num =
int(input("Enter a number: "))
factorial = 1
for i in range(1,
num + 1):
factorial *= i
print(f"Factorial
of {num} is {factorial}")
14. Factorial of a
number using a while loop
num =
int(input("Enter a number: "))
factorial = 1
i = 1
while i <= num:
factorial *= i
i += 1
print(f"Factorial
of {num} is {factorial}")
15. Print the
Fibonacci sequence up to a given number
n =
int(input("Enter a number: "))
a, b = 0, 1
while a <= n:
print(a, end=" ")
a, b = b, a + b
16. Print the
Fibonacci sequence up to n terms using a while loop
n =
int(input("Enter the number of terms: "))
a, b = 0, 1
count = 0
while count <
n:
print(a, end=" ")
a, b = b, a + b
count += 1
17. Print the sum of
the digits of a number
num =
int(input("Enter a number: "))
sum = 0
while num > 0:
digit = num % 10
sum += digit #
num = num // 10
print("Sum of
the digits:", sum)
18. Check if a number
is prime using a while loop
num =
int(input("Enter a number: "))
i = 2
is_prime = True
while i <= num
// 2:
if num % i == 0:
is_prime = False
break
i += 1
if is_prime:
print(f"{num} is a prime
number.")
else:
print(f"{num} is not a prime
number.")
19. Print all prime
numbers up to 50
for num in
range(2, 51):
for i in range(2, num):
if num % i == 0:
break
else:
print(num)
20. Find the GCD of
two numbers using a while loop
a =
int(input("Enter the first number: "))
b =
int(input("Enter the second number: "))
while b:
a, b = b, a % b
print(f"GCD
is {a}")
21. Find the LCM of
two numbers using a for loop
def gcd(a, b):
while b:
a, b = b, a % b
return a
def lcm(a, b):
return a * b // gcd(a, b)
a =
int(input("Enter the first number: "))
b =
int(input("Enter the second number: "))
print(f"LCM
is {lcm(a, b)}")
22. Count the number
of digits in a number
num =
int(input("Enter a number: "))
count = 0
while num > 0:
num //= 10
count += 1
print(f"Number
of digits:", count)
23. Calculate the
power of a number using a for loop
base =
int(input("Enter the base: "))
exponent =
int(input("Enter the exponent: "))
result = 1
for _ in
range(exponent):
result *= base
print(f"{base}
to the power of {exponent} is {result}")
24. Reverse a number
using a while loop
num =
int(input("Enter a number: "))
reversed_num = 0
while num > 0:
digit = num % 10
reversed_num = reversed_num * 10 +
digit
num = num // 10
print("Reversed
number:", reversed_num)
25. Print the sum of
squares of numbers from 1 to 10
total = 0
for i in range(1,
11):
total += i ** 2
print("Sum of
squares:", total)
26. Print the cube of
numbers from 1 to 5
for i in range(1,
6):
print(f"Cube of {i} is {i ** 3}")
27. Check if a number
is a palindrome using a while loop
num =
int(input("Enter a number: "))
original_num = num
reversed_num = 0
while num > 0:
digit = num % 10
reversed_num = reversed_num * 10 + digit
num //= 10
if original_num ==
reversed_num:
print(f"{original_num} is a
palindrome.")
else:
print(f"{original_num} is not a
palindrome.")
28. Print all
Armstrong numbers between 100 and 999
for num in
range(100, 1000):
sum_of_cubes = sum(int(digit) ** 3 for
digit in str(num))
if sum_of_cubes == num:
print(num)
29. Check if a number
is an Armstrong number using a while loop
num =
int(input("Enter a number: "))
sum_of_cubes = 0
temp = num
while temp > 0:
digit = temp % 10
sum_of_cubes += digit ** 3
temp //= 10
if num ==
sum_of_cubes:
print(f"{num} is an Armstrong
number.")
else:
print(f"{num} is not an Armstrong
number.")
30. Print the
factorial of a number using recursion
def factorial(n):
if n == 1:
return 1
else:
return n * factorial(n - 1)
num =
int(input("Enter a number: "))
print(f"Factorial
of {num} is {factorial(num)}")
31. Print a pyramid
pattern of stars
rows =
int(input("Enter the number of rows: "))
for i in range(1,
rows + 1):
print(' ' * (rows - i) + '*' * (2 * i - 1))
32. Print an inverted
pyramid pattern of stars
rows =
int(input("Enter the number of rows: "))
for i in
range(rows, 0, -1):
print(' ' * (rows - i) + '*' * (2 * i - 1))
33. Find the sum of
the digits of an integer using a for loop
num =
input("Enter a number: ")
total = 0
for digit in num:
total += int(digit)
print("Sum of
digits:", total)
34. Calculate the
average of numbers entered by the user
total = 0
count = 0
while True:
num = input("Enter a number (or 'done'
to finish): ")
if num.lower() == 'done':
break
total += float(num)
count += 1
print("Average:",
total / count)
35. Generate a list of
squares of numbers from 1 to n
n =
int(input("Enter a number: "))
squares = [i ** 2
for i in range(1, n + 1)]
print("List
of squares:", squares)
36. Print all
multiples of 4 between 1 and 100
for i in range(4,
101, 4):
print(i)
37. Check if a number
is a perfect square using a while loop
import math
num =
int(input("Enter a number: "))
sqrt =
math.isqrt(num)
if sqrt * sqrt ==
num:
print(f"{num} is a perfect
square.")
else:
print(f"{num} is not a perfect
square.")
38. Check if a number
is a perfect number
num =
int(input("Enter a number: "))
divisors = [i for
i in range(1, num) if num % i == 0]
if sum(divisors)
== num:
print(f"{num} is a perfect
number.")
else:
print(f"{num} is not a perfect
number.")
39. Print the
factorial of numbers from 1 to n
n =
int(input("Enter a number: "))
factorial = 1
for i in range(1,
n + 1):
factorial *= i
print(f"Factorial of {i} is
{factorial}")
40. Find the largest
number in a list using a loop
lst = [int(x) for
x in input("Enter numbers separated by spaces: ").split()]
largest = lst[0]
for num in lst:
if num > largest:
largest = num
print("Largest
number:", largest)
41. Print all prime
factors of a given number
num =
int(input("Enter a number: "))
i = 2
while num > 1:
if num % i == 0:
print(i)
num //= i
else:
i += 1
42. Find the smallest
number in a list using a loop
lst = [int(x) for
x in input("Enter numbers separated by spaces: ").split()]
smallest = lst[0]
for num in lst:
if num < smallest:
smallest = num
print("Smallest
number:", smallest)
43. Print the first n
odd numbers
n =
int(input("Enter the number of odd numbers: "))
count = 0
i = 1
while count <
n:
print(i)
i += 2
count += 1
44. Print the first n
even numbers
n =
int(input("Enter the number of even numbers: "))
count = 0
i = 2
while count <
n:
print(i)
i += 2
count += 1
45. Count the number
of vowels and consonants in a string
string =
input("Enter a string: ").lower()
vowels = 'aeiou'
vowel_count =
consonant_count = 0
for char in
string:
if char.isalpha():
if char in vowels:
vowel_count += 1
else:
consonant_count += 1
print("Vowels:",
vowel_count)
print("Consonants:",
consonant_count)
46. Print the reverse
of a string using a loop
string =
input("Enter a string: ")
reversed_string =
""
for char in
string:
reversed_string = char + reversed_string
print("Reversed
string:", reversed_string)
47. Count the
frequency of each character in a string
string =
input("Enter a string: ").lower()
frequency = {}
for char in
string:
if char in frequency:
frequency[char] += 1
else:
frequency[char] = 1
print("Character
frequency:", frequency)
Print all the
factors of a number
num =
int(input("Enter a number: "))
for i in range(1,
num + 1):
if num % i == 0:
print(i)
48. Calculate the sum
of series 1 + 1/2 + 1/3 + ... + 1/n
n =
int(input("Enter a number: "))
total = 0
for i in range(1,
n + 1):
total += 1 / i
print("Sum of
the series:", total)
49. Print the elements
of a list in reverse order using a for loop
lst = [int(x) for
x in input("Enter numbers separated by spaces: ").split()]
for i in
range(len(lst) - 1, -1, -1):
print(lst[i])
50. Count the
frequency of elements in a list using a dictionary
lst = [1, 2, 2, 3,
3, 3, 4, 4, 4, 4]
frequency = {}
for item in lst:
if item in frequency:
frequency[item] += 1
else:
frequency[item] = 1
print("Frequency
of elements:", frequency)
