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Rebol Programming/mod

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< Rebol Programming
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USAGE:

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MOD a b

DESCRIPTION:

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Compute a nonnegative remainder of A divided by B.

MOD is a function value.

ARGUMENTS:

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  • a -- (Type: number money time)
  • b -- Must be nonzero. (Type: number money time)

(SPECIAL ATTRIBUTES)

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  • catch

SOURCE CODE

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mod: func [
    "Compute a nonnegative remainder of A divided by B." 
    [catch] 
    a [number! money! time!] 
    b [number! money! time!] "Must be nonzero." 
    /local r
][
    all [negative? r: a // b r: r + b] 
    a: abs a 
    either all [a + r = (a + b) positive? r + r - b] [r - b] [r]
]
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