# Hexa Decimal Number System

Base-16, or the Hexa Decimal Number System, employs sixteen symbols to represent integers. Instead of using ten symbols (0-9), the hexa decimal system employs A to F to express digits beyond 9. This number system is utilized in computer science, programming, color representation, memory addressing, and error correction. Working with these applications requires knowledge of the Hexadecimal Number System.

## 1.1 Hexadecimal Number System Definition

Positional numeral system Hexa Decimal Number System has a base of 16. It represents integers with 16 symbols, including 0-9 and A-F. Each symbol represents a 16-power. For example, “A” represents 10, “B” 11, and so on up to “F” 15. Combining these symbols yields hexadecimal numerals. This small binary data structure is widely utilized in computers and digital systems that require simplicity and compactness.

The Hexa Decimal Number System began with positional numeral systems and the desire for a more robust number representation. The Babylonians and Egyptians used base-60 and base-10 to create the first positional numeric systems. Claude Shannon and George Stibitz developed the binary numeral system in the mid-20th century, which may have led to the contemporary hexadecimal system. Its broad use was due to its use in computer systems and binary data representation.

Ever seen those odd 0x numbers? What do those odd numbers beyond 0-9 mean? Do not worry—you’re not alone. Once you understand them, hexadecimal numerals aren’t that hard. With its mix of letters and numbers, hex may seem intimidating to beginners, but I’ll explain. In this lesson, I’ll explain the hexadecimal number system, how to convert between hex and decimal, and some of its uses in computers and beyond. Hex proficiency and confidence will be yours at the end. Ready to decipher hexadecimal numbers? Jump in!

## What Is Hex and Why Use It?

After learning them, hexadecimal numerals are simple. Hex employs 16 characters (0-9 and A-F) to express numeric values, unlike decimal, which uses 10 digits.Why hex? Hex benefits programmers and techies. It compactly represents binary numbers with two hexadecimal digits per eight binary digits. Humans can read and work with it easier. Hex helps with memory addressing, color values, and error detection.Understanding hex requires knowing its 16 digits. The decimal values of 0-9 are the same. E=14, F=15, A=10, B=11. 2F is decimal 47, which is 2*16 plus 15.

Converting decimal to hex is easy. Divide the decimal by 16. Rest becomes rightmost hex. Divide it again by 16 and repeat till you get 0. The hex digits are reversed remainders. 157 / 16 = 9 residual 13 for hex conversion. Rightmost hex is D. Zero remainder 9 / 16. The following hex is 9. Therefore, 157 is 9D hex.To convert hex to decimal, multiply each digit by 16 raised to its right place. So B3A in hex is: B (11) * 16^2 = 11 * 256 = 2816. 3 * 16^1 = 3 * 16 = 48 A (10) * 16^0 = 10 * 1 = 10 Sum = 2816 + 48 + 10 = 2874 Initially confusing, hex can be read like a pro with some practice converting between hex, decimal, and binary. Technology, programming, and digital systems enthusiasts should learn hex.

### Digits, Conversion, and Examples of Hexadecimal Numbers

Hexadecimal numbers are 0-9 and A-F. The letters A–F represent 10–15. Hexadecimal numerals are easy to utilize once you understand the system.

The letters A, B, C, D, E, and F represent values 10 to 15, whereas the digits 0-9 represent values 0 to 9. The decimal equivalent of 2AF16 is 687.

Add the place values of each digit to convert a hexadecimal integer to decimal. As an example:

B16 = 1110

1216 = 18

FF16 = 255

Divide a decimal number by 16 and note the residue to convert to hexadecimal. Remainder is last digit. Repeat with the quotient divided by 16. As an example:

687/16 = 42/15. The last digit is 15.

42/16 = 2 left 10. So A is the next-to-last digit.

2/16=0 remaining 2. First digit is 2.

Combining, 68710 = 2AF16

### Examples and uses

Web designers and programmers utilize hexadecimal numbers for colors and memory addresses. A few examples:

• #FFFFFF = White
• #0000FF=Blue
• Memory 16: 0x10.
• Memory 31: 0x1F

The hexadecimal system may appear unusual at first, but learning how to convert between decimal and hex and identifying frequent codes can make you more comfortable with it. Regular exposure and practice will make hexadecimal second nature.

### Hexadecimal Uses: CompSci, Color, Memory, Error Detection

Hexadecimal numbers have many computing and technology uses.

### Cyberscience and Programming

Programmers and computer scientists employ hexadecimal numbers. Many programming languages support hexadecimal color values, character encodings, and memory locations. It compacts binary numbers from long sequences of 0s and 1s.

### Color Shown

RGB employs hexadecimal triplets to represent colors. Each hexadecimal digit represents a color’s red, green, or blue. Examples: #0000FF is vivid blue, #FF0000 is red, while #FFFFFF is white. Over 16 million color combinations are conceivable with 256 levels of each color.

Hexadecimal numbers represent computer memory addresses. Two digits can represent 256 values in hexadecimal, making it helpful for addressing memory in bytes. Hexadecimal 0x10 is decimal 16. A 4KB memory block could be addressed 0x1000 to 0x1FFF in hex.

### Detect and Fix Errors

Error detection and rectification techniques use hexadecimal numbers. Checksums, cyclic redundancy checks, and hash functions use hexadecimal numbers. An MD5 hash, used to verify data integrity, provides a 32-digit hexadecimal value.

Hexadecimal may appear strange, but its many computing and technology uses make it worth learning. Regular use can make hexadecimal, decimal, and binary conversions automatic. Hexadecimal’s small representation simplifies addressing and coding that would otherwise need large binary strings. Hexadecimal powers many of our everyday technology.

### Hex vs. Decimal: Pros and Cons

Do you wish to comprehend hexadecimal numbers but find them confusing? No worries—we got you. Hexadecimal, or hex, is another number system like decimal. The main change is 16 digits instead of 10. Hex numerals, which use A–F to represent 10–15, may seem odd. Converting hex to decimal is easy. Hex numbers are preferable to decimal because they’re smaller and employed in computing and coding. Cons include being hard to read and not intuitive for most individuals.

Decimal numbers are converted to hex by dividing by 16. Consider the decimal 197. Divide 197/16. With 5 left, you receive 12. Remainder is last hex. Divide 12 by 16 again. A residual of 12 yields 0. Hex number: C5 (12 = C, 5 = 5). Multiplying by 16 converts hex to decimal. Hex 1A2. Multiply the last, 2, by 1. A is the middle digit; multiply by 16. Decimal A = 10, so 10 x 16 equals 160. Finally, multiply 1 by 256 (16 x 16). 1 x 256 is 256. 1 x 256 = 256, 10 x 16 = 160, 2 x 1 = 2. Hex 1A2 is 256 + 160 + 2 = 418 decimal.

Not difficult! After a little practice translating number systems, hex will be second nature. Hex has many uses in computing and coding, thus studying it will help you grasp how computers and digital technologies work. Happy converting!

The base-16 number system, or hex, employs 16 symbols to represent numbers. It uses 0-9 and A-F. Hex represents greater numbers more compactly than decimal.

### Why use hex?

Programmers and computer scientists utilize hexadecimal. Computers internally employ this compact binary number representation. Memory addresses, color codes (#FFFFFF for white), and error detection codes are in hex.

### How can I convert decimal to hex?

• Converting a decimal to hex is easy. Here are the steps:
• Divide the decimal by 16. Last hex digit is residual.
• Keep dividing by 16 and noting the remainders to acquire the last to first hex digits.
• Finish if the result is 0. Otherwise, the initial hex digit remains.
• for instance, 255 to hex:
• 15 remains 255/16. Last hex is F.
• 15/16=0 remaining 15. Next hex is F.
• 0 / 16 = 0. No residual, initial hex digit 0. Results are 0FF in hex.
• When converting hex to decimal, multiply each digit by 16 raised to the right. For example, C8 in hex = 12 * 16^1 + 8 * 16^0 = 192 + 8 = 200 in decimal.
• To clarify, here are some more examples:
• Decimal 10 equals hex A
• Decimal 15 = hex F
• Decimal 255 = hex FF
• Hex FE = decimal 254.
• Hex 1F4 = decimal 500
• Hex FFF = decimal 4095