if statement in R can only have one line?

Question

I was trying a tiny code with if statement, although it is very simple,but there is something I really confused here is the code

n<-857
while(n!=1){
if(n         


        

Answer 1

You have to use {} for allows the if statement to have more than one line. Try this:

n<-857
while(n!=1){
  if(n<=0){
    print("please input a positive integer")
  }

  else if(n%%2==0){
    n<-n/2
    print(n)
  }
    else {
      n<-3*n+1
      print(n)
    }
}