other:python:misc_by_jyp
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other:python:misc_by_jyp [2023/05/04 09:46] jypeter [Data representation] Added the Base notions section |
other:python:misc_by_jyp [2023/05/04 11:19] jypeter [Base notions] |
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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'') |
| * 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' | ||
other/python/misc_by_jyp.txt · Last modified: 2024/04/19 12:02 by jypeter
