bc(1) bc(1)[top]NAMEbc- arbitrary-precision arithmetic languageSYNOPSIS[file...]DESCRIPTIONis an interactive processor for a language that resembles C but pro‐ vides unlimited-precision arithmetic. It takes input from any files given, then reads the standard input. Options recognizes the following command-line options: Compile only. is actually a preprocessor for which invokes automati‐ cally (see dc(1)). Specifying prevents invoking dc, and sends the dc input to standard output. causes an arbitrary-precision math library to be predefined. As a side effect, the scale factor is set. Program Syntax L a single letter in the range through E expression; S statement; R relational expression. Comments Comments are enclosed in and Names Names include: simple variables: L array elements: L [ E ] stacks: L Other Operands Other operands include: Arbitrarily long numbers with optional sign and decimal point. ( E ) sqrt ( E ) length ( E ) number of significant decimal digits scale ( E ) number of digits right of dec‐ imal point L ( E , ... , E ) Strings of ASCII characters enclosed in quotes (""). Arithmetic Operators: Arithmetic operators yield an E as a result and include: is remainder (not mod, see below); is power). (prefix and append; apply to names) Relational Operators Relational operators yield an R when used as op Statements E { S ; ... ; S } if ( R ) S while ( R ) S for ( E ; R ; E ) S null statement break quit Function Definitions define L ( L ,..., L ) { auto L, ... , L S; ... S return ( E ) } Functions in −l Math Library Functions in the math library include: s(x) sine c(x) cosine e(x) exponential l(x) log a(x) arctangent j(n,x) Bessel function All function arguments are passed by value. Trigonomet‐ ric angles are in radians where 2 pi radians = 360 degrees. The value of a statement that is an expression is printed unless the main operator is an assignment. No operators are defined for strings, but the string is printed if it appears in a context where an expression result would be printed. Either semicolons or new-lines can separate statements. Assignment to scale influences the number of digits to be retained on arithmetic operations in the manner of dc(1). Assignments to or set the input and output number radix respectively, again as defined by dc(1). The same letter can be used simultaneously as an array, a function, and a simple variable. All variables are global to the program. "Auto" variables are pushed down during function calls. When using arrays as function arguments or defining them as automatic variables, empty square brackets must follow the array name. The operator yields the remainder at the current scale, not the integer modulus. Thus, at scale 1, is .1 (one tenth), not 1. This is because (at scale 1) is 2.3 with .1 as the remainder.EXAMPLESDefine a function to compute an approximate value of the exponential function: Print approximate values of the exponential function of the first ten integers.WARNINGSThere are currently no (AND) or (OR) comparisons. The statement must have all three expressions. is interpreted when read, not when executed. parser is not robust in the face of input errors. Some simple expression such as 2+2 helps get it back into phase. The assignment operators: and are obsolete. Any occurences of these operators cause a syntax error with the exception of which is interpreted as followed by a unary minus. Neither entire arrays nor functions can be passed as function parameters.FILESdesk calculator executable program mathematical librarySEE ALSObs(1), dc(1). tutorial inSTANDARDS CONFORMANCEbc(1)

List of man pages available for

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]

Polar

Member of Polar

Based on Fawad Halim's script.

....................................................................

Vote for polarhome |