foo <- function(i=0, j=0.0){
	a <- i
	print(a)
	return(3)
}
bar <- function(i=0) {
	i<-3
	i<-5
	return(i)
}
baz <- function() {
	print("hello")
	return("world")
}
a <- foo(4, 1.1)
print(a)
b <- bar(100)
print(b)
c <- baz()
print(c)
