What is binary and why is it important in computing?

Binary is a base-2 number system using only 0s and 1s. It's fundamental to computing because computers process information using electrical signals that are either on (1) or off (0).

How do I convert binary to decimal?

To convert binary to decimal, multiply each binary digit by 2 raised to its position power, then sum all results. For example, 1011₂ = (1×2³) + (0×2²) + (1×2¹) + (1×2⁰) = 8 + 0 + 2 + 1 = 11₁₀

What's the difference between hexadecimal and decimal?

Decimal uses base-10 (digits 0-9) while hexadecimal uses base-16 (digits 0-9 and letters A-F). Hexadecimal is commonly used in programming to represent binary data more compactly.