Summary 📝

Hexadecimal is a base-16 number system used in computing to simplify binary. To convert a decimal number into 2-digit hexadecimal, you divide the number by 16 and use the remainder. The first digit is how many 16s go into the decimal number (the quotient), and the second digit is the remainder. 

Each digit is then written as a hexadecimal value, using 0–9 for values 0 to 9 and A–F for values 10 to 15. This method makes it easier to read and work with large binary values. 

Computers use hexadecimal as a shorthand for binary because it's more compact and clearer for humans to understand. For example, the decimal number 255 converts to hexadecimal as FF. 

Key learning Points 📌

• Hexadecimal is base-16, using digits 0–9 and letters A–F.

• Each hexadecimal digit represents 4 bits in binary.

• Convert both parts to hex values (e.g. 10 = A, 15 = F).

• Helps make binary values easier to read and use in computing.