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is_power

By Daniel · December 26, 2008

Tests whether n is a power of base; more precisely, whether there exists some power p such that base^p = n.

/* is_power(n, base)
 *
 * Tests whether n is a power of base; more precisely, whether there exists
 * some power p such that base^p = n.
 */

if (argument0 == 0) return (argument1 == 0);
if (argument1 == 0) return (argument0 == 1) * -1;
if (argument1 == 1) return (argument0 == 1);
return ((logn(argument1, argument0) mod 1) == 0);

Categories: Mathematics

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