DokuWiki

Site Tools

Trace: • xml_cheat_sheet • r_cheat_sheet • soap_cheat_sheet • win32software
notes:bc_cheat_sheet

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
notes:bc_cheat_sheet [2026/06/07 22:49]
216.73.217.92 old revision restored (2026/06/03 02:16) 		notes:bc_cheat_sheet [2026/06/13 21:24] (current)
216.73.216.124 old revision restored (2026/06/03 02:16)
Line 1: Line 1:
-===== GNU bc Cheat Sheet =====+==== GNU bc Cheat Sheet ====
  
-==== Overview ====+=== Overview ===
  
   *  [[http://en.wikipedia.org/wiki/Bc_programming_language | bc ]] is a command-line calculator and primitive language   *  [[http://en.wikipedia.org/wiki/Bc_programming_language | bc ]] is a command-line calculator and primitive language
Line 7: Line 7:
   *  bc is a [[http://www.opengroup.org/onlinepubs/009695399/utilities/bc.html |POSIX standard]] but the [[http://www.gnu.org/software/bc/ | GNU version]] has added functionality   *  bc is a [[http://www.opengroup.org/onlinepubs/009695399/utilities/bc.html |POSIX standard]] but the [[http://www.gnu.org/software/bc/ | GNU version]] has added functionality
  
-  *  bc by default runs in integer mode (scale=0) and with no trig functions, running ''bc -l'' loads trig functions and sets scale to 20+  *  bc by default runs in integer mode (scale=0) and with no trig functions, running "bc -l" loads trig functions and sets scale to 20
  
-  *  bc can only take expressions on standard input or in files, not directly on the command line. One way to do a bc one-liner is ''echo 3+4 | bc'' .+  *  bc can only take expressions on standard input (or in files), not directly on the command line e.g. echo 3+4 | bc
  
   * [[http://www.phodd.net/cyrek/gnu-bc/ | This]] is a great collection of bc functions. funcs.bc and logic.bc  are the basic ones. [[ http://x-bc.sourceforge.net/extensions_bc.html | This]] is a collection of more sanely named basic scientific calculator functions.   * [[http://www.phodd.net/cyrek/gnu-bc/ | This]] is a great collection of bc functions. funcs.bc and logic.bc  are the basic ones. [[ http://x-bc.sourceforge.net/extensions_bc.html | This]] is a collection of more sanely named basic scientific calculator functions.
Line 23: Line 23:
 </code> </code>
    
-So now '' mbc '(3+5)/6' '' works as expected+So now "mbc '(3+5)/6'" works as expected
  
   * bc uses readline so ⇑ and ⇓ (for history) and ctrl-r (for searching) work as expected.   * bc uses readline so ⇑ and ⇓ (for history) and ctrl-r (for searching) work as expected.
  
-==== Basic Usage ====+=== Basic Usage ===
  
   * Any alphanumeric variable name is allowed once it starts with a letter.   * Any alphanumeric variable name is allowed once it starts with a letter.
Line 51: Line 51:
   * && , || , ! work as expected (return 0 or 1).   * && , || , ! work as expected (return 0 or 1).
  
-==== Advanced Usage ====+=== Advanced Usage ===
  
   * New functions are easy to define e.g. <code>   * New functions are easy to define e.g. <code>
notes/bc_cheat_sheet.1780897767.txt.gz · Last modified: 2026/06/07 22:49 by 216.73.217.92

Page Tools

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
CC Attribution-Noncommercial-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki