People have been using hexadecimal since ancient times. There is no record of who "invented" it. You might as well ask who invented counting. But we know it was used because we do know that the ancient Babylonians were regularly using base 60 (sexagesimal). That's a system we still use today because 60 is so highly divisible, it being the lowest value that has 1, 2, 3, 4, 5 and 6 as factors. We use it to tell the time (60 seconds to the minute, 60 minutes to the hour, two 12 hour periods in a day) and to measure angles (360 degrees in a circle).
Given the ancient Babylonians knew the highly-divisible nature of sexagesimal, it stands to reason they would have been fully aware of other bases, including binary, the most primitive of all the bases. They would also have been fully aware of the very close relationship between binary and all other bases that are themselves a power of 2, including octal (base 8) and hexadecimal (base 16). But as to who invented it -- or rather who discovered it -- we simply do not know.
Considering the lowest five digit hexadecimal number is 10000 (65,536) and the highest is FFFFF (1,048,575), there are 983,040 different hexadecimal numbers that are five digits.
990 = 3DE
42
hexadecimal decoder
import java.util.Scanner; public class NumberSystem { public void displayConversion() { Scanner input = new Scanner(System.in); System.out.printf("%-20s%-20s%-20s%-20s\n", "Decimal", "Binary", "Octal", "Hexadecimal"); for ( int i = 1; i <= 256; i++ ) { String binary = Integer.toBinaryString(i); String octal = Integer.toOctalString(i); String hexadecimal = Integer.toHexString(i); System.out.format("%-20d%-20s%-20s%-20s\n", i, binary, octal, hexadecimal); } } // returns a string representation of the decimal number in binary public String toBinaryString( int dec ) { String binary = " "; while (dec >= 1 ) { int value = dec % 2; binary = value + binary; dec /= 2; } return binary; } //returns a string representation of the number in octal public String toOctalString( int dec ) { String octal = " "; while ( dec >= 1 ) { int value = dec % 8; octal = value + octal; dec /= 8; } return octal; } public String toHexString( int dec ) { String hexadecimal = " "; while ( dec >= 1 ) { int value = dec % 16; switch (value) { case 10: hexadecimal = "A" + hexadecimal; break; case 11: hexadecimal = "B" + hexadecimal; break; case 12: hexadecimal = "C" + hexadecimal; break; case 13: hexadecimal = "D" + hexadecimal; break; case 14: hexadecimal = "E" + hexadecimal; break; case 15: hexadecimal = "F" + hexadecimal; break; default: hexadecimal = value + hexadecimal; break; } dec /= 16; } return hexadecimal; } public static void main( String args[]) { NumberSystem apps = new NumberSystem(); apps.displayConversion(); } }
AAAAAAAAAAAA is the Hexadecimal.
If the above is decimal then in hexadecimal it is 2964492C2. If it is binary then in hexadecimal it is 7DA. If it is octal then in hexadecimal it is 49241208.
234 in hexadecimal is EA.
That depends what you want to "solve" for - in other words, what the question is. For example, whether you want to:* Convert from hexadecimal to decimal* Convert from decimal to hexadecimal* Count in hexadecimal* Add hexadecimal numbers* etc.
The hexadecimal for 14 is the letter E.
It equates to 26 in hexadecimal.
D63A
60 in hexadecimal would be 3C
19 in hexadecimal is 25 in decimal. 20 follows it and is 26 in hexadecimal.19 in decimal is 13 in hexadecimal. 20 in decimal is 14 in hexadecimal.
4 is 4 in hexadecimal of decimal.
The question is ambiguous:what is 68 in hexadecimal when converted to decimal, orwhat is 68 in decimal when converted to hexadecimal.
Just get a different hexadecimal. Here is a really good hexadecimal chart: http://www.w3schools.com/tags/ref_colornames.asp