plfcall.nim

proc optarg(x:int, y:int=0):int = x + y
proc optarg2(x:int, y:int=0, z:int=0):int = x + y - z
proc singlearg(x:int):int = 20*x

echo optarg 1, optarg 2, singlearg 2  # prints 1240
echo optarg2 1, optarg2 2, singlearg 2  # prints 1240
echo optarg2(1, optarg2(2, singlearg 2)) # prints 43

echo 1.optarg 2.optarg, singlearg 2  # prints 340 
echo 1.optarg2 2.optarg2, singlearg 2 # prints 340