25 Basic Python Coding Questions

25 Basic Python Coding Questions along with Explanations for each.

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Question : Write a Python program to print "Hello, World!".

# Explanation
print("Hello, World!")        

Question : Calculate the sum of two numbers entered by the user.

# Explanation
num1 = float(input("Enter the first number: "))
num2 = float(input("Enter the second number: "))
sum_result = num1 + num2
print("Sum:", sum_result)        

Question : Write a Python program to check if a given number is even or odd.

# Explanation
num = int(input("Enter a number: "))
if num % 2 == 0:
??print("Even")
else:
??print("Odd")        

Question : Calculate the factorial of a given number.

# Explanation
def factorial(n):
??if n == 0 or n == 1:
????return 1
??else:
????return n * factorial(n - 1)

num = int(input("Enter a number: "))
print("Factorial:", factorial(num))        

Question : Find the largest among three numbers entered by the user.

# Explanation
num1 = float(input("Enter the first number: "))
num2 = float(input("Enter the second number: "))
num3 = float(input("Enter the third number: "))

largest = max(num1, num2, num3)
print("Largest number:", largest)        

Question : Write a Python program to print all even numbers from 1 to 20.

# Explanation
for i in range(2, 21, 2):
??print(i)        

Question : Calculate the sum of all numbers from 1 to a given number.

# Explanation
num = int(input("Enter a number: "))
sum_result = sum(range(1, num + 1))
print("Sum:", sum_result)        

Question : Write a Python program to check if a given string is a palindrome.

# Explanation
def is_palindrome(s):
??return s == s[::-1]

string = input("Enter a string: ")
if is_palindrome(string):
??print("Palindrome")
else:
??print("Not a palindrome")        

Question : Count the number of vowels in a given string.

# Explanation
def count_vowels(s):
??vowels = "aeiouAEIOU"
??return sum(1 for char in s if char in vowels)

string = input("Enter a string: ")
print("Number of vowels:", count_vowels(string))        

Question : Reverse a given list in-place.

# Explanation
lst = [1, 2, 3, 4, 5]
lst.reverse()
print(lst)        

Question : Remove duplicates from a list.

# Explanation
lst = [1, 2, 2, 3, 4, 4, 5]
unique_lst = list(set(lst))
print(unique_lst)        

Question : Check if a given number is prime.

# Explanation
def is_prime(num):
??if num <= 1:
????return False

??for i in range(2, int(num**0.5) + 1):
????if num % i == 0:
??????return False
??return True

num = int(input("Enter a number: "))
if is_prime(num):
??print("Prime")
else:
??print("Not prime")        

Question : Convert a string to uppercase.

# Explanation
string = "hello world"
upper_string = string.upper()
print(upper_string)        

Question : Calculate the area of a circle with a given radius.

# Explanation
import math
radius = float(input("Enter the radius of the circle: "))
area = math.pi * radius**2
print("Area of the circle:", area)        

Question : Replace all occurrences of a character in a string.

# Explanation
string = "hello world"
new_string = string.replace('l', 'L')
print(new_string)        

Question : Write a Python program to find the maximum element in a list.

# Explanation
lst = [10, 25, 7, 30, 15]
max_element = max(lst)
print("Maximum element:", max_element)        

Question : Calculate the square root of a given number.

# Explanation
import math
num = float(input("Enter a number: "))
sqrt_result = math.sqrt(num)
print("Square root:", sqrt_result)        

Question : Check if two strings are anagrams.

# Explanation
def are_anagrams(str1, str2):
??return sorted(str1) == sorted(str2)

string1 = input("Enter the first string: ")
string2 = input("Enter the second string: ")
if are_anagrams(string1, string2):
??print("Anagrams")
else:
??print("Not anagrams")        

Question : Check if a list is empty.

# Explanation
lst = []
if not lst:
??print("List is empty")
else:
??print("List is not empty")        

Question : Calculate the power of a number.

# Explanation
base = float(input("Enter the base: "))
exponent = float(input("Enter the exponent: "))
power_result = base ** exponent
print("Result:", power_result)        

Question : Find the length of the longest word in a given sentence.

# Explanation
sentence = input("Enter a sentence: ")
words = sentence.split()
max_length = max(len(word) for word in words)
print("Length of the longest word:", max_length)        

Question : Check if a given number is a perfect square.

# Explanation
def is_perfect_square(num):
??return int(num**0.5)**2 == num

num = int(input("Enter a number: "))
if is_perfect_square(num):
??print("Perfect square")
else:
??print("Not a perfect square")        

Question : Find the common elements between two lists.

# Explanation
list1 = [1, 2, 3, 4, 5]
list2 = [4, 5, 6, 7, 8]
common_elements = list(set(list1) & set(list2))
print("Common elements:", common_elements)        

Question : Capitalize the first letter of each word in a sentence.

# Explanation
sentence = "hello world"
capitalized_sentence = sentence.title()
print(capitalized_sentence)        

Question : Print the Fibonacci sequence up to a given number of terms.

# Explanation
def fibonacci(n):
??fib_seq = [0, 1]
??while len(fib_seq) < n:
????fib_seq.append(fib_seq[-1] + fib_seq[-2])
??return fib_seq

num_terms = int(input("Enter the number of terms: "))
fibonacci_seq = fibonacci(num_terms)
print("Fibonacci sequence:", fibonacci_seq)