Summary

number_system: a way to represent numbers using a chosen base (also called radix). Common systems: decimal_system (base 10), binary_system (base 2), octal_system (base 8), hexadecimal_system (base 16). All use positional_notation and place_value for their digits. Hex uses digits 0 to 9 and letters A to F. Typical prefixes mark the base: 0b for binary, 0o for octal, 0x for hex. Remember: changing the base changes the symbols and the value of each position.