bc

bc [] [`options`

]`files`

**bc** is a language (and
compiler) whose syntax resembles that of C, but with
unlimited-precision arithmetic. **bc** consists of identifiers, keywords, and
symbols, which are briefly described in the following entries.
Examples are given at the end.

Interactively perform arbitrary-precision arithmetic or
convert numbers from one base to another. Input can be taken from
*files* or read from the standard input. To exit,
type **quit** or EOF.

**-h**,**--help**Print help message and exit.

**-i**,**--interactive**Interactive mode.

**-l**,**--mathlib**Make functions from the math library available.

**-s**,**--standard**Ignore all extensions, and process exactly as in POSIX.

**-w**,**--warn**When extensions to POSIX

**bc**are used, print a warning.**-q**,**--quiet**Do not display welcome message.

**-v**,**--version**Print version number.

An identifier is a series of one or more characters. It must begin with a lowercase letter but may also contain digits and underscores. No uppercase letters are allowed. Identifiers are used as names for variables, arrays, and functions. Variables normally store arbitrary-precision numbers. Within the same program you may name a variable, an array, and a function using the same letter. The following identifiers would not conflict:

*x*Variable

*x*.*x*[*i*]Element

*i*of array*x*.*i*can range from 0 to 2047 and can also be an expression.*x*(*y*,*z*)Call function

*x*with parameters*y*and*z*.

**ibase**, **obase**, **scale**, and **last** store a value. Typing them on a line by themselves displays ...

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