Write Python programs to print even numbers from 1 to 100 and a number guessing game.

Welcome back — missed you this week. Here are the solutions to the problems: Part 2: Programming Problems 1. Program to print all even numbers from 1 to 100 This program uses a for loop to iterate through numbers from 1 to 100 and an if statement to check if a number is even. `python Python program to print even numbers from 1 to 100 print("Even numbers from 1 to 100:") for i in range(1, 101): if i % 2 == 0: print(i) ` The range(1, 101) generates numbers from 1 up to (but not including) 101. The modulo operator % checks for a remainder when divided by 2. If the remainder is 0, the number is even. 2. Number guessing game using a while loop This game generates a random number and prompts the user to guess it. It continues until the correct number is guessed, providing hints along the way. `python Python number guessing game import random secret_number = random.randint(1, 20) Generates a random number between 1 and 20 guess = 0 print("I'm thinking of a number between 1 and 20.") while guess != secret_number: try: guess = int(input("Take a guess: ")) if guess < secret_number: print("Your guess is too low.") elif guess > secret_number: print("Your guess is too high.") else: print(f"Good job! You guessed my number, which was secret_number!") except ValueError: print("Invalid input. Please enter a number.") ` The while loop continues as long as the guess is not equal to the secret_number. The random.randint() function is used to generate the number. 3. Convert temperature converter to use if-else for unit selection Assuming a basic temperature converter that takes a value and converts it based on a chosen unit. This example shows how if-else statements can be used to select the conversion logic. `python Python temperature converter using if-else for unit selection def convert_temperature(): try: temp_value = float(input("Enter the temperature value: ")) original_unit = input("Enter the original unit (C for Celsius, F for Fahrenheit): ").upper() if original_unit == 'C': Convert Celsius to Fahrenheit fahrenheit = (temp_value * 9/5) + 32 print(f"temp_value°C is fahrenheit°F") elif original_unit == 'F': Convert Fahrenheit to Celsius celsius = (temp_value - 32) * 5/9 print(f"temp_value°F is celsius°C") else: print("Invalid unit. Please enter 'C' or 'F'.") except ValueError: print("Invalid input. Please enter a numeric value for temperature.") Call the function to run the converter convert_temperature() ` The if original_unit == 'C' block executes if the input unit is Celsius, performing the C to F conversion. The elif original_unit == 'F' block handles Fahrenheit to Celsius. The else block catches invalid unit inputs. Part 3: Research & Analysis 1. Compare for, while, and do-while loops with examples • A for loop is used when the number of iterations is known beforehand. It iterates over a sequence (like a list, tuple, dictionary, set, or string) or a range of numbers. Example (Python): `python For loop example for i in range(3): Iterates 3 times (0, 1, 2) print(f"For loop iteration i") ` • A while loop is used when the number of iterations is not known beforehand, and the loop continues as long as a certain condition is true. The condition is checked before each iteration. Example (Python): `python While loop example count = 0 while count < 3: Continues as long as count is less than 3 print(f"While loop iteration count") count += 1 ` • A do-while loop (not directly available in Python but common in languages like C++, Java) is similar to a while loop, but its condition is checked after each iteration. This guarantees that the loop body executes at least once. Example (Pseudocode, as Python doesn't have a direct do-while): ` Do-while loop example (pseudocode) do print("Do-while loop iteration"); // Some action while (condition is true); ` In Python, a do-while can be simulated using a while True loop with a break statement inside. 2. When would you use nested loops vs separate loops? • Nested loops are used when you need to iterate through combinations of elements from multiple sequences or when processing multi-dimensional data structures like matrices. An inner loop completes all its iterations for each single iteration of an outer loop. For example, printing a multiplication table or iterating over rows and columns of a grid. • Separate loops are used when you need to perform distinct, independent operations on different sets of data or the same data at different times. Each loop completes its execution entirely before the next loop begins. For example, processing a list of names, then separately processing a list of ages. Using separate loops is generally more efficient if the operations are independent, as nested loops increase computational complexity significantly. 3. Explain the "break" and "continue" statements with diagrams (Note: Diagrams cannot be provided in this text-based format, but the explanation clarifies their flow.) • The break statement is used to terminate the execution of the innermost loop (for or while) immediately. When break is encountered, the program exits the loop and continues execution at the statement immediately following the loop. It's often used when a specific condition is met, and further iterations are unnecessary. Example (Python): `python Break statement example for i in range(5): if i == 3: print("Breaking loop at i = 3") break Exits the loop print(f"Current i: i") Output: Current i: 0 Current i: 1 Current i: 2 Breaking loop at i = 3 ` • The continue statement is used to skip the rest of the current iteration of the loop and proceed to the next iteration. When continue is encountered, the program jumps to the beginning of the loop for the next iteration, re-evaluating the loop condition (for while loops) or moving to the next item (for for loops). It's useful when you want to skip processing for certain conditions but still want the loop to complete its full range of iterations. Example (Python): `python Continue statement example for i in range(5): if i == 2: print("Skipping iteration at i = 2") continue Skips the rest of this iteration print(f"Current i: i") Output: Current i: 0 Current i: 1 Skipping iteration at i = 2 Current i: 3 Current i: 4 ` Got more? Send 'em 📸