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# abcs |
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A libabacus front end for the command-line. |
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## Syntax |
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Please see the libabacus documentation (external/libabacus/README.md) for a guide through the syntax. |
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## Implementation |
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abcs uses GNU MPFR for its number implementations. It keeps 200 digits of precision, and displays up to 50. By default, |
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3 digits are displayed. The `request_precision` function can be used to request more digits to be displayed. |
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## RC File |
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abcs loads, by default, an `.abcsrc` file in the same directory in which it is run. It parses the whole file ingoring |
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newlines and spaces, and evaluates it in order. The RC file can be used to specify constants or declare functions that |
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the user wants to re-use between sessions. |
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## Provided Functions and Operators |
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|Operator|Function|Precedence| |
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|--------|--------|----------| |
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| < | lt | 1 | |
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| <= | lte | 1 | |
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| == | equals | 1 | |
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| > | gt | 1 | |
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| >= | gte | 1 | |
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| + | plus | 2 | |
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| - | minus | 2 | |
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| * | times | 3 | |
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| / | divide | 3 | |
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| ^ | pow | 3 | |
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| - | negate | (prefix) | |
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| ! | factorial | (postfix) | |
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|Function|Description| |
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|--------|----| |
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|lt | less than comparator.| |
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|lte | less than or equal comparator.| |
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|equals| equality comparator. | |
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|gt| greater than comparator. | |
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|gte| greater than or equal comparator. | |
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|plus| addition function. | |
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|minus| subtraction function. | |
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|times| multiplication function. | |
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|divide| division function. | |
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|pow| exponentiation function | |
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|negate| flip sign of number. | |
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|factorial| factorial via the gamma function. | |
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|ln|natural logarithm function.| |
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|exp| e to the nth power function.| |
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|sqrt| square root function.| |
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|sin| trigonometric sine function. | |
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|cos| trigonometric cosine function. | |
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|tan| trigonometric tangent function. | |
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|arcsin| trigonometric inverse sine function. | |
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|arccos| trigonometric inverse cosine function. | |
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|arctan| trigonometric inverse tangent function. | |
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|quit| quits the REPL. | |
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|request\_precision| requests the given number of digits to be displayed in the REPL. | |
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Subproject commit 01720914e0899023747c94ef7cf4c5d17782d7dd |
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Subproject commit 899ac31210d31bea3b08bc94fc03432dd8a6029e |
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