abs -- r7rs Definition

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Kind

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procedure;

Implemented by

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• abs (from vonuvoli);

Procedure signature

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Procedure variants:

• ((real-zero) -> (real-zero))
  • input: a value of type real-zero;
  • output: a value of type real-zero;
• ((real-positive) -> (real-positive))
  • input: a value of type real-positive;
  • output: a value of type real-positive;
• ((real-negative) -> (real-positive))
  • input: a value of type real-negative;
  • output: a value of type real-positive;
• ((real) -> (real-nan))
  • input: a value of type real;
  • output: a value of type real-nan;

Exports

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• scheme:base -- (scheme base);

Exports recursive

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• scheme -- (scheme);

Description

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(abs x)

The abs procedure returns the absolute value of its argument.

(abs -7)                ===>  7

---

The text herein was sourced and adapted as described in the "R7RS attribution of various text snippets" appendix.

Referenced-types

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• real-zero;
• real-positive;
• real-negative;
• real;
• real-nan;