Popcorn Hack 1: Examples for Identifying Binary

Example 1:

  • Number: 101010
  • This is binary becuase there are only 0’s and 1’s

Example 2:

  • Number: 12301
  • Digits other than 0 and 1 are present

Example 3:

  • Number: 11001
  • This is binary becuase there are only 0’s and 1’s

Popcorn Hack 2: Adding and Subtracting Using Binary

Example 1:

  • Binary Numbers: 101 + 110
  • Add starting from the right: 1 + 0 = 1, 0 + 1 = 1, 1 + 1 = 10 (carry over 1). Result: 1011.

Example 2:

  • Binary Numbers: 1101 - 1011
  • Start from the right: 1 - 1 = 0, 0 - 1 requires borrowing, 10 - 0 = 10, 1 - 1 = 0. Result: 010.

Example 3:

  • Binary Numbers: 111 + 1001
  • Add starting from the right: 1 + 1 = 10 (carry over 1), 1 + 0 + 1 = 10 (carry over 1), 1 + 0 + 1 = 10 (carry over 1). Result: 1110.

Popcorn Hack 1:

What will be the result of this expression?

True or False and False

ANSWER: TRUE

Popcorn Hack 2:

What will be the result of this expression?

not True and False

ANSWER: FALSE

Popcorn Hack 3:

What will be the result of this expression?

True or False and not False

ANSWER: TRUE

Homework Hack: Binary Converter

Here is my code below:

def decimal_to_binary(decimal_num):
    """Converts a decimal number to binary (returns a string)."""
    if decimal_num == 0:
        return "0"
    elif decimal_num < 0:
        return "-" + bin(decimal_num)[3:]  # Remove '-0b' prefix
    else:
        return bin(decimal_num)[2:]  # Remove '0b' prefix

def binary_to_decimal(binary_str):
    if binary_str.startswith("-"):
        return -int(binary_str[1:], 2)
    else:
        return int(binary_str, 2)

# Testing
print("Decimal to Binary:")
print(f"10 → {decimal_to_binary(10)}")
print(f"-15 → {decimal_to_binary(-15)}")
print(f"0 → {decimal_to_binary(0)}")

print("\nBinary to Decimal:")
print(f"1010 → {binary_to_decimal('1010')}")
print(f"-1111 → {binary_to_decimal('-1111')}")
print(f"0 → {binary_to_decimal('0')}")

Decimal to Binary:
10 → 1010
-15 → -1111
0 → 0

Binary to Decimal:
1010 → 10
-1111 → -15
0 → 0

Homework Hack 2: Difficulty Level Checker

Here is my fixed code below:

import time

difficulty = input("Enter difficulty (easy, medium, hard): ").lower().strip()

while difficulty not in ["easy", "medium", "hard"]:
    print("Please enter a valid difficulty level.")
    difficulty = input("Enter difficulty (easy, medium, hard): ").lower().strip()
    time.sleep(0.5)

print("Difficulty set to:", difficulty)


Please enter a valid difficulty level.
Please enter a valid difficulty level.
Difficulty set to: medium