Several example codes

Program Overview

This Python program reads an even number from the user and prints the character 'B' in each line using a loop.
If the input number is odd, the program displays an error message and exits.
This exercise helps reinforce basic loop structures and conditional checks in Python.

Python Code:

def print_b_rows(n):
    if n % 2 != 0:
        print("Please enter an even number.")
        return
    for _ in range(n):
        print("B")

# Run the program
rows = int(input("Enter an even number of rows: "))
print_b_rows(rows)

Sample Output (input: 6):

B  
B  
B  
B  
B  
B

Step-by-Step Explanation:

- First, the program checks whether the input number is even
- If it is, a for loop prints the character 'B' in each row
- If the number is odd, an error message is shown and the loop is skipped