sqrt -- r7rs Definition

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Kind

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procedure;

Implemented by

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• sqrt (from vonuvoli);

Procedure signature

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Procedure variants:

• ((number-zero) -> (real-zero))
  • input: a value of type number-zero;
  • output: a value of type real-zero;
• ((real-positive-not-inf) -> (real-positive-not-inf))
  • input: a value of type real-positive-not-inf;
  • output: a value of type real-positive-not-inf;
• ((real-negative-not-inf) -> (complex-not-inf-not-nan))
  • input: a value of type real-negative-not-inf;
  • output: a value of type complex-not-inf-not-nan;
• ((number) -> (number-nan))
  • input: a value of type number;
  • output: a value of type number-nan;

Exports

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• scheme:inexact -- (scheme inexact);

Exports recursive

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• scheme -- (scheme);

Description

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(sqrt z)

Returns the principal square root of z. The result will have either a positive real part, or a zero real part and a non-negative imaginary part.

(sqrt 9)   ===>   3
(sqrt -1)  ===>  +i

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

Referenced-types

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• number-zero;
• real-zero;
• real-positive-not-inf;
• real-negative-not-inf;
• complex-not-inf-not-nan;
• number;
• number-nan;