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B
bc
Bench calculator arbitrary-precision arithmetic language (POSIX, toybox)

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bc

QNX SDP8.0Utilities ReferenceUtilities

Bench calculator arbitrary-precision arithmetic language (POSIX, toybox)

Syntax:

bc [-ilqsw] [file...]

Runs on:

QNX OS

Options:

-i --interactive: Force interactive mode.
-l --mathlib: Include a library of defined math functions and set the scale to 20. (See Library functions, below).
-q --quiet: Don't print version and copyright.
-s --standard: Print an error if any non-POSIX extensions are used.
-w --warn: Give warnings if any non-POSIX extensions are used.
file: The pathname of a text file containing commands and function definitions to be interpreted by bc. If any files are specified, bc processes those files, then reads from the standard input.

Description:

The bc utility is an interactive, programmable calculator that supports a complete set of control structures, including functions.

Library functions

The bc library is enabled if you invoke bc with the -l ("el") option, or if you include the interpretation file /usr/lib/bclib.b in the command line. The library sets the scale to 20, which you can override by assigning a new value. The library defines the following functions:


Syntax	Function
`a(expression)`	Arctangent (in radians)
`c(expression)`	Cosine (in radians)
`e(expression)`	Exponential function
`j(expr1,expr2)`	Bessel function of integer order
`l(expression)`	Natural logarithm
`s(expression)`	Sine (in radians)

This utility is provided as part of the toybox package. For information on how to enable it, see toybox.

Contributing author:

Rob Landley and the toybox project (see https://landley.net/toybox/).

Page updated: August 09, 2024