"ZhangRuoyu" <zhangry@comp.eng.himeji-tech.ac.jp> writes: I want to test the program ... Start = primes 100 Start = mapfun [sqrt,sin,cos] 1.0 but I cannot test all the program at one time ... can someone help me? Try Start :: ([Int], [Real]) Start = (primes 100, mapfun [sqrt,sin,cos] 1.0)