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Computer Science

1What is Binary and Why It Matters
2Counting in Binary
3Converting Binary to Decimal
4Converting Decimal to Binary
5Binary Addition
6Binary Subtraction
7Hexadecimal Number System
8Converting Between Binary and Hexadecimal
9Octal Number System
10Signed Integer Representation
11Two's Complement Arithmetic
12Fixed-Point and Floating-Point Basics
13Boolean Values and Truth Tables
14The NOT Gate (Inverter)
15The AND Gate
16The OR Gate
17The XOR Gate (Exclusive OR)
18NAND and NOR Gates
19Boolean Expressions and Laws
20De Morgan's Laws
21Building Complex Circuits from Basic Gates
22Simplifying Boolean Expressions
23What is Character Encoding?
24ASCII: The Foundation
25Extended ASCII and Code Pages
26Unicode: Universal Character Set
27UTF-8 Encoding
28UTF-16 and UTF-32
29Byte Order Marks and Endianness
30Common Encoding Issues

Computer Science

1What is Binary and Why It Matters
2Counting in Binary
3Converting Binary to Decimal
4Converting Decimal to Binary
5Binary Addition
6Binary Subtraction
7Hexadecimal Number System
8Converting Between Binary and Hexadecimal
9Octal Number System
10Signed Integer Representation
11Two's Complement Arithmetic
12Fixed-Point and Floating-Point Basics
13Boolean Values and Truth Tables
14The NOT Gate (Inverter)
15The AND Gate
16The OR Gate
17The XOR Gate (Exclusive OR)
18NAND and NOR Gates
19Boolean Expressions and Laws
20De Morgan's Laws
21Building Complex Circuits from Basic Gates
22Simplifying Boolean Expressions
23What is Character Encoding?
24ASCII: The Foundation
25Extended ASCII and Code Pages
26Unicode: Universal Character Set
27UTF-8 Encoding
28UTF-16 and UTF-32
29Byte Order Marks and Endianness
30Common Encoding Issues

← Computer Science

Lesson 1772 of 2,872·40. Theory of Computation: Regular LanguagesPro lesson

Optional Elements and the Question Mark

Use the ? operator to express optional elements and construct patterns with zero-or-one occurrences.

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