Loop in r - r - learn r - r programming

  • A loop is a way to repeat a sequence of instructions under certain conditions.
  • They allow we to automate parts of our code that are in need of repetition.
  • In R Programming, we have to follow three conditional loops:
    • For Loop
    • While Loop
    • Repeated loop

For Loop:

  • In R programming, a for loop is used to iterate over a vectors.
  • A for loop is a repetition control structure that permits we to efficiently write a loop that wants to execute an exact number of times.
 for loop


for (value in vector) 

While Loop:

  • In R programming, while loops are used to loop until a specific condition is satisfied.
  • These is similar to for loop, but the iterations are controlled by a conditional statement.
if else while loop


while (test_expression)

Repeat Loop:

  • In general, the Repeat loop executes the same condition many times until a stop condition is satisfied.
  • A repeat loop is used to iterate over a block of code multiple number of times.
repeat loop

Repeat Loop: Syntax:


Loop Control Statements in R programming:

  • Loop control statements modification execution from its standard sequence.
  • once execution leaves a scope, all automatic objects that were created there in scope area unit destroyed.
  • R supports the following two control statements such as,
    • Break Statement
    • Next statement

Break Statement:

  • A break statement is used inside a loop to stop the iterations and flow the control external of the loop.
  • In a nested looping situation, where there is a loop inside another loop, this statement exits from the innermost loop that is being evaluated.
  • It can be used to terminate a case in the switch statement.



Next Statement:

  • A next statement is useful when we want to skip the current iteration of a loop without terminating it.
  • On come across next, the R parser skips additional evaluation and starts next iteration of the loop.



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