How to Create Repeat Loop in R Programming

In this tutorial, we will learn to make a repeat loop with the use of R programming.

A repeat loop is used to iterate over a block of code over several number of times.

In case of a repeat loop, there is no condition to check in for exiting repeat loop.

Hence, we must ourselves put a condition explicitly within a repeat loop body and make use of the break statement to exit the loop. Failing to do so will result into an infinite loop.

 Syntax of repeat loop

repeat {
   statement
}

When in the statement block, we must use the statement ‘break’ to exit the loop.

Example: repeat loop

x <- 1

repeat {
   print(x)
   x = x+1
   if (x == 6){
       break
   }
}

 Output

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

Note that in the example above, we have only made use of a condition to check and exit the loop when x equals the value of 6.

That is why we see in our output that only values from 1 to 5 get printed.

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This post originally appeared on – www.datamentor.io/r-programming/repeat-loop

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