While Loop in R

While Loop In R: Syntax, Flow Chart With Example…!!

R is a language and environment for visual design and statistical computing. It is a GNU project comparable to the S language and environment that John Chambers and colleagues created at Bell Laboratories (previously AT&T, now Lucent Technologies). R might be thought of as an alternative S implementation. Although there are some significant differences, much of the code created for S works flawlessly under R.

Loop in R Programming Language

R improves at carrying out repetitive tasks. A loop is used when we want a collection of processes to be performed numerous times. R will carry out the instructions inside a loop a certain number of times, or up until a predetermined condition is satisfied when you build a loop. The for loop, while loop and repeat loop are the three primary forms of loops in R. Not just in R, but in all programming languages, loops are a mainstay and a potent tool (although in our opinion, they are used far too frequently when writing R code).

In R programming, there are three distinct kinds of loops. In this article, we are going to learn about while loop in r programming language. 

  • For loop
  • While Loop
  • Repeat Loop

While loop in R

A while loop is a form of a loop that you might employ (but perhaps less frequently). When you wish to keep looping up until a certain logical condition is met, you use the while loop (contrast this with the for loop, which will always iterate through an entire sequence).

Flow chart of while loop in r

While loop in r: flow chart
While loop in r: flow chart 2

The while loop’s fundamental structure is as follows:

while(logical_condition){ expression }

Or 

while (test_expression)

{statement}

This logical condition tells about when to stop the function of a loop.

An easy example of a while loop is:

Input

  • i <- 1
  • while (i = 5) {
  •   i <- i + 1
  •   print(i)
  • }

Output

  • ## [1] 2
  • ## [1] 3
  • ## [1] 4
  • ## [1] 5

In the above example, we have given a simple condition: while loop in r works until the condition becomes true, the value of i equals 5. 

When should I use a loop?

Loops are fairly frequently utilized when you need them to perform looping tasks. Often more effective than loops, functions can be used to carry out equivalent tasks. However, this appeals to the question of when to employ a loop.

In R, loops are generally implemented inefficiently and should be avoided whenever better options are available, particularly when working with huge datasets. However, there are situations when a loop is the only option to get the desired outcome.

Conclusion 

We hope you understand how to use while loop in r programming language. As we have discussed all While loop in r. 

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FAQ (Frequently Asked Questions)

Difference Between For loop in r and while loop in r

When the number of code iterations that should be run is known, a for loop is used; when the number of iterations is uncertain, a while loop is used.

How to end a loop in R Programming

To end a loop, use next and break. There are several control structures that can be utilized in addition to loops.

next:
Continue with the subsequent loop iteration and skip the current one.

break:
Break the loop entirely (stop the loop and jump to the end).

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