Sum of First N numbers:
| n = int(input(“Enter a positive integer: “)) sum = 0 for i in range(1, n+1): sum += i print(“The sum of the first”, n, “natural numbers is:”, sum) |
Find factorial for given number:
| n = int(input(“Enter a positive integer: “)) factorial = 1 for i in range(1, n+1): factorial *= i print(“The factorial of”, n, “is:”, factorial) |
Multiplication table program:
| n = int(input(“Enter a positive integer: “)) for i in range(1, 11): product = i * n print(n, “x”, i, “=”, product) |
Print even numbers from 1 to 10:
| n = int(input(“Enter a positive integer: “)) print(“Even numbers from 1 to”, n, “are:”) for i in range(1, n+1): if i % 2 == 0: print(i) |
Print factors for given number:
| n = int(input(“Enter a positive integer: “)) print(“Factors of”, n, “are:”) for i in range(1, n+1): if n % i == 0: print(i) |
Prime number program:
| n = int(input(“Enter a positive integer: “)) is_prime = True for i in range(2, n): if n % i == 0: is_prime = False break if is_prime: print(n, “is a prime number”) else: print(n, “is not a prime number”) |
Perfect number program:
| n = int(input(“Enter a positive integer: “)) sum = 0 for i in range(1, n//2 + 1): if n % i == 0: sum += i if sum == n: print(n, “is a perfect number”) else: print(n, “is not a perfect number”) |
Fibonacci Series program:
| n = int(input(“Enter the number of terms: “)) a, b = 0, 1 for i in range(1, n+1): print(a) c = a + b a, b = b, c |