Bc - Revision history

Christoph: /* Examples */

2022-03-13T05:02:40Z

‎Examples

Christoph: /* Examples */

2021-10-28T08:37:14Z

‎Examples

Christoph: /* Examples */

2021-10-28T08:33:41Z

‎Examples

Christoph: /* External links */

2021-09-10T23:41:43Z

‎External links

Christoph: Created page with "'''bc''' is an arbitrary precision calculator language found on most Linux distributions. `bc` is a language that supports arbitrary precision numbers with interac..."

2021-09-10T23:40:40Z

Created page with "'''bc''' is an arbitrary precision calculator language found on most Linux distributions. <code>bc</code> is a language that supports arbitrary precision numbers with interac..."

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'''bc''' is an arbitrary precision calculator language found on most Linux distributions.

<code>bc</code> is a language that supports arbitrary precision numbers with interactive execution of statements. There are some similarities in the syntax to the C programming language. A standard mathematics library is available by command-line option. If requested, the math library is defined before processing any files. <code>bc</code> starts by processing code from all the files listed on the command line in the order listed. After all files have been processed, <code>bc</code> reads from the standard input. All code is executed as it is read. (If a file contains a command to halt the processor, <code>bc</code> will never read from the standard input.)

==Examples==

$ echo "111111111 * 111111111" | bc # => 12345678987654321
$ echo "sqrt(25)" | bc -qi # => 5
$ let x=3*4-6; echo $x # => 6
$ echo $[ (10 + 5) / 2] # => 7
$ echo "(10+5)/2" | bc -l # => 7.50000000000000000000

* Convert 10MB to KB from within bash by running the following:
$ expr $((size_in_MB << 10))
$ # E.g.,
$ expr $((10MB << 10)) # => 10240

* Cube roots:
<pre>
# NOTE:
# n√x = x(1/n) = e(ln x)/n
# x^y=e^(y * ln(x))
# ~or~
# echo "e(y*l(x))" | bc -l
# echo 'e(l({number})/3)' | bc -l

$ echo 'e(l(74088)/3)' | bc -l
41.99999999999999999967 => 42
$ echo 74088 | awk '{ print $1^(1/3) }'
42
</pre>

==See also==
* [[Bash]]
* [[Awk]]
* [[Sed]]

==External links==
* [http://phodd.net/gnu-bc/bcfaq.html GNU bc FAQ]

[[Category:Linux Command Line Tools]]

← Older revision		Revision as of 08:33, 28 October 2021
Line 29:		Line 29:
	$ echo 74088 \| awk '{ print $1^(1/3) }'		$ echo 74088 \| awk '{ print $1^(1/3) }'
	42		42
		+	</pre>
		+
		+	===Scientific notation===
		+
		+	* Get the result of 90 billion / 22 million / 365:
		+	$ awk 'BEGIN { print 90e9/22e6/365 }' # => 11.208
		+	$ awk 'BEGIN { printf "%.4f", 90e9/22e6/365 }' # => 11.2080
		+
		+	* Other methods:
		+	<pre>
		+	$ perl -le 'print 90e9/22e6/365' # => 11.2079701120797
		+	$ perl -e 'printf "%.4f\n", 90e9/22e6/365' # => 11.2080
		+	$ echo "$(printf '%.4f' '90e9')/$(printf '%.4f' '22e6')/365" \| bc -l # => 11.20797011207970112079
	</pre>		</pre>

@@ Line 10: / Line 10: @@
   $ echo $[(10+5)/2]  # => 7
   $ echo "(10+5)/2" | bc -l  # => 7.50000000000000000000
 * Convert 10MB to KB from within bash by running the following:

@@ Line 8: / Line 8: @@
   $ echo "sqrt(25)" | bc -qi  # => 5
   $ let x=3*4-6; echo $x  # => 6
-  $ echo $[ (10 + 5) / 2]  # => 7
+  $ echo $[(10+5)/2]  # => 7
   $ echo "(10+5)/2" | bc -l  # => 7.50000000000000000000

@@ Line 38: / Line 38: @@
 ==External links==
 * [http://phodd.net/gnu-bc/bcfaq.html GNU bc FAQ]
 [[Category:Linux Command Line Tools]]

Bc - Revision history

Christoph: /* Examples */

Christoph: /* Examples */

Christoph: /* Examples */

Christoph: /* External links */

Christoph: Created page with "'''bc''' is an arbitrary precision calculator language found on most Linux distributions. bc is a language that supports arbitrary precision numbers with interac..."

Christoph: Created page with "'''bc''' is an arbitrary precision calculator language found on most Linux distributions. `bc` is a language that supports arbitrary precision numbers with interac..."