An illustration of a while loop in R

control_flow_while.R

# Set the initial value of a
a  <- 1

# Print the current value of a while a is less than or equal to 5
while (a <= 5){
  # Print the current value of a
  print(a)
  # Increment the value of a by 1
  a = a + 1
}

[1] 1
[1] 2
[1] 3
[1] 4
[1] 5

# Note that the final value of a when the loop exited is six
a

[1] 6