expt -- r7rs Definition

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Kind

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procedure;

Implemented by

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• expt (from vonuvoli);

Procedure signature

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Procedure variants:

• ((real-not-nan real-not-nan) -> (real-not-nan))
  • inputs:
    • a value of type real-not-nan;
    • a value of type real-not-nan;
  • output: a value of type real-not-nan;
• ((complex-not-nan complex-not-nan) -> (complex-not-nan))
  • inputs:
    • a value of type complex-not-nan;
    • a value of type complex-not-nan;
  • output: a value of type complex-not-nan;
• ((number number) -> (number-nan))
  • inputs:
    • a value of type number;
    • a value of type number;
  • output: a value of type number-nan;

Exports

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• scheme:base -- (scheme base);

Exports recursive

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• scheme -- (scheme);

Description

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(expt z_1 z_2)

Returns z_1 raised to the power z_2. For nonzero z_1, this is z_1^z_2 = e^(z_2 log z_1) The value of 0^z is 1 if (zero? z), 0 if (real-part z) is positive, and an error otherwise. Similarly for 0.0^z, with inexact results.

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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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• real-not-nan;
• complex-not-nan;
• number;
• number-nan;