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Code Block
// requires jython and jython-engine jars
engine = mgr.getEngineByName("jython")
engine.eval('''
def factorial(n):
    i=fact=1
    while i <= n:
        fact=fact*i
        i=i+1
    return fact

result = factorial(4)
''')
println 'jython: ' + engine.result

Or Clojure:

Code Block

// requires clojure and clojure-engine jars
// Note: doesn't seem officially supported, hacked a version from here:
// http://wiki.github.com/pmf/clojure-jsr223
engine = mgr.getEngineByName("clojure")
println 'clojure: ' + engine.eval('''
(defn factorial [n]
   (if (< n 2)
       1
       (* n (factorial (- n 1)))))
(factorial 4)
''')

Or Jaskell:

Code Block
// requires jaskell and jaskell engine and jparsec and jfunutil jars
engine = mgr.getEngineByName("jaskell")
engine.eval('factorial n = if n > 0 then n * factorial (n-1) else 1')
println 'jaskell: ' + engine.eval('factorial 4')

...

No Format
javascript: 24.0
jruby: 24
jython: 24
clojure: 24
jaskell: 24

See also: Accessing Groovy from Java via JSR-223