Factorial

Impressum/Kontaktparent nodes: implemented functions

Factorial

testAplFactorial
"http://www.microapl.co.uk/apl_help/ch_020_020_250.htm"

"When applied to a positive whole number, ! gives the product of the whole numbers from 1 to that number, inclusive."

"Equivalent of 123"
self assert: 3 asApl aplFactorial = 6 asApl.

"If the argument is non-integer and positive, !! gives the mathematical 'gamma function' of the argument + 1."
"Remark (frg): Will use one of rosettacode.org/wiki/Gamma_function with higher precission"

self assert: (2.5 asApl aplFactorial asObject asFloat - 3.32335097) abs < 1e-9.