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| other:python:misc_by_jyp [2023/05/04 11:46] – [Data representation] Added the Base notions section jypeter | other:python:misc_by_jyp [2023/05/04 13:19] – [Base notions] jypeter |
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| * 1 byte <=> 8 bits | * 1 byte <=> 8 bits |
| * ''REAL*4'' <=> 4 bytes <=> 32 bits | * ''REAL*4'' <=> 4 bytes <=> 32 bits |
| * For easier written/displayed representation, 1 byte is usually split into 2 groups of 4 bits, using base 16 and [[https://en.wikipedia.org/wiki/Hexadecimal|hexadecimal representation]] | * For easier written/displayed representation, 1 byte is usually split into 2 groups of 4 bits, and displayed using base 16 and [[https://en.wikipedia.org/wiki/Hexadecimal|hexadecimal representation]] (characters ''0'', ''1'', ..., ''A'', ''B'', ..., ''F'') |
| * ''0000'' <=> ''0'', ''0010'' <=> ''1'', ..., ''1111'' <=> ''F'' | * ''0000'' <=> ''0'',\\ ''0010'' <=> ''1'', ...,\\ ''1111'' <=> ''F'' |
| * ''1101'' <=> ''D'' in hexadecimal <=> ''13'' in decimal (''**1** * 8 + **1** * 4 + **0** * 2 + **1** * 1'') | * ''1101'' <=> ''D'' in hexadecimal <=> ''13'' in decimal (''**1** * 8 + **1** * 4 + **0** * 2 + **1** * 1'') |
| * ''11111101'' <=> ''1111 1101'' <=> ''FC'' in hexadecimal <=> ''253'' in decimal (''15 * 16 + 13'') | * ''11111101'' <=> ''1111 1101'' <=> ''FD'' in hexadecimal <=> ''253'' in decimal (''15 * 16 + 13'') |
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| * Conversion with Python | * Conversion with Python |
| * <code>>>> hex(13) # Decimal to Hexadecimal conversion | * <code>>>> hex(13) # Decimal to Hexadecimal conversion |
| '0xd' | '0xd' |
| >>> hex(255) | >>> hex(253) |
| '0xff' | '0xfd' |
| >>> hex(256) | >>> hex(256) |
| '0x100' | '0x100' |
