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These exercises cover basic function practices, working with function arguments, return values, lambda functions, and advanced lambda usage with functions like map(), filter(), and reduce(). ### 1. Basic Function Practice #### a. is_even(): Check if a number is even

def is_even(number):
    return number % 2 == 0

# Example usage:
print(is_even(4))  # Output: True
print(is_even(7))  # Output: False

#### b. factorial(): Calculate the factorial using a loop

def factorial(n):
    result = 1
    for i in range(2, n + 1):
        result *= i
    return result

# Example usage:
print(factorial(5))  # Output: 120
print(factorial(0))  # Output: 1

### 2. Function Arguments #### a. greet_user(): Greeting with keyword arguments

def greet_user(first_name, last_name):
    print(f"Hello, {first_name} {last_name}!")

# Example usage with keyword arguments:
greet_user(first_name="John", last_name="Doe")
# Output: Hello, John Doe!

#### b. calculate_area(): Calculate the area of a circle with a default argument

def calculate_area(radius, pi=3.14159):
    return pi * radius * radius

# Example usage:
print(calculate_area(5))        # Output: 78.53975
print(calculate_area(5, 3.14))  # Output: 78.5 (using a different value of pi)

### 3. Working with Return Values #### a. find_max(): Find the maximum value in a list

def find_max(numbers):
    if not numbers:
        return None
    max_value = numbers[0]
    for number in numbers:
        if number > max_value:
            max_value = number
    return max_value

# Example usage:
print(find_max([1, 2, 3, 4, 5]))  # Output: 5
print(find_max([-10, -20, -30]))  # Output: -10

#### b. reverse_string(): Reverse a string

def reverse_string(s):
    return s[::-1]

# Example usage:
print(reverse_string("hello"))  # Output: "olleh"
print(reverse_string("world"))  # Output: "dlrow"

### 4. Lambda Functions #### a. List of squares using map()

squares = list(map(lambda x: x ** 2, range(1, 11)))

# Example usage:
print(squares)  # Output: [1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

#### b. Filter words shorter than 5 characters using filter()

words = ["apple", "banana", "pear", "kiwi", "grape"]
long_words = list(filter(lambda word: len(word) >= 5, words))

# Example usage:
print(long_words)  # Output: ['apple', 'banana']

### 5. Advanced Lambda Usage #### a. reduce(): Find the product of all elements in a list

from functools import reduce

numbers = [1, 2, 3, 4, 5]
product = reduce(lambda x, y: x * y, numbers)

# Example usage:
print(product)  # Output: 120

#### b. Combine map() and filter(): Squares of even numbers from 1 to 20

squares_of_even_numbers = list(map(lambda x: x ** 2, filter(lambda x: x % 2 == 0, range(1, 21))))

# Example usage:
print(squares_of_even_numbers)  # Output: [4, 16, 36, 64, 100, 144, 196, 256, 324, 400]

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Here’s another coding quiz question for you: Question: What will be the output of the following Java code?

public class Test {
    public static void main(String[] args) {
        int a = 5;
        int b = 10;
        
        System.out.println(a++ + --b);
        System.out.println(a + " " + b);
    }
}

Options: a) 14 6 10 b) 14 6 9 c) 15 6 9 d) 14 5 10 Which option do you think is correct?

Certainly! Here are some coding questions related to control structures, including conditional statements, loops, and list comprehensions. ### 1. Question: FizzBuzz Challenge Write a Python program that prints the numbers from 1 to 50. For multiples of three, print "Fizz" instead of the number, and for the multiples of five, print "Buzz". For numbers that are multiples of both three and five, print "FizzBuzz". #### Solution:

for num in range(1, 51):
    if num % 3 == 0 and num % 5 == 0:
        print("FizzBuzz")
    elif num % 3 == 0:
        print("Fizz")
    elif num % 5 == 0:
        print("Buzz")
    else:
        print(num)

### 2. Question: Calculate Factorial Write a Python function to calculate the factorial of a number using a while loop. #### Solution:

def factorial(n):
    result = 1
    while n > 0:
        result *= n
        n -= 1
    return result

# Test the function
print(factorial(5))  # Output: 120

### 3. Question: List of Even Numbers Using list comprehension, write a Python program that generates a list of even numbers between 1 and 100. #### Solution:

even_numbers = [x for x in range(1, 101) if x % 2 == 0]
print(even_numbers)

### 4. Question: Grade Calculator Write a Python program that takes a numerical score as input and prints the corresponding letter grade based on the following scale: - A: 90-100 - B: 80-89 - C: 70-79 - D: 60-69 - F: Below 60 #### Solution:

def get_grade(score):
    if score >= 90:
        return "A"
    elif score >= 80:
        return "B"
    elif score >= 70:
        return "C"
    elif score >= 60:
        return "D"
    else:
        return "F"

# Test the function
score = 85
print(f"Score: {score}, Grade: {get_grade(score)}")  # Output: Score: 85, Grade: B

### 5. Question: Sum of Digits Write a Python program that takes a number and returns the sum of its digits. Use a while loop to achieve this. #### Solution:

def sum_of_digits(num):
    total = 0
    while num > 0:
        total += num % 10
        num //= 10
    return total

# Test the function
print(sum_of_digits(1234))  # Output: 10

### 6. Question: Multiplication Table Write a Python program to print the multiplication table for a given number using a for loop. #### Solution:

def multiplication_table(n):
    for i in range(1, 11):
        print(f"{n} x {i} = {n * i}")

# Test the function
multiplication_table(5)

Output:

5 x 1 = 5
5 x 2 = 10
5 x 3 = 15
5 x 4 = 20
5 x 5 = 25
5 x 6 = 30
5 x 7 = 35
5 x 8 = 40
5 x 9 = 45
5 x 10 = 50

### 7. Question: Filter Words by Length Write a Python program using list comprehension to filter a list of words and return only those that are longer than a given length. #### Solution:

words = ["apple", "banana", "cherry", "date", "elderberry", "fig", "grape"]
length = 5

filtered_words = [word for word in words if len(word) > length]
print(filtered_words)  # Output: ['banana', 'cherry', 'elderberry']

### 8. Question: Check Prime Number Write a Python program that checks whether a given number is prime. Use a for loop and conditional statements. #### Solution:

def is_prime(n):
    if n <= 1:
        return False
    for i in range(2, int(n**0.5) + 1):
        if n % i == 0:
            return False
    return True

# Test the function
print(is_prime(11))  # Output: True
print(is_prime(25))  # Output: False

### 9. Question: Find Common Elements Write a Python program to find the common elements between two lists using list comprehension. #### Solution:

list1 = [1, 2, 3, 4, 5]
list2 = [4, 5, 6, 7, 8]

common_elements = [x for x in list1 if x in list2]
print(common_elements)  # Output: [4, 5]

### 10. Question: Reverse a String Write a Python program to reverse a string using a for loop. #### Solution:

def reverse_string(s):
    reversed_s = ""
    for char in s:
        reversed_s = char + reversed_s
    return reversed_s

# Test the function
print(reverse_string("hello"))  # Output: "olleh"

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