Hello,
I have a simple question: I want to list numbers 1:k, but if k <1, I hope nothing listed.
how should we do?
k=2
for (i in 1:k)  print(i) 
[1] 1    # <-correct
[1] 2
k=0
for (i in 1:k) print(i)
[1] 1      #<---- wrong
[1] 0

 

thanks
jian




      
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