R Loops - Studyopedia

09 Feb R Loops

Posted at 23:48h in R by Studyopedia Editorial Staff 0 Comments

R loops execute a block of code and this code executes while the condition is true. Here are the types of loops in R:

In the while loop, the block of code executes only when the condition is true. It executes as long as the condition is true.

Here is the syntax:

while (condition is true) {
    statement;
}

Let us see an example to implement while loop in R:

marks <- 95

# while loop
while (marks < 100) {
  print(marks)
  marks = marks + 1
}

Output

[1] 95
[1] 96
[1] 97
[1] 98
[1] 99

The for loop is used when you can set how many times a statement is to be executed.

Here is the syntax:

for (value in k) {
   statements
}

Above, k can be a vector, list, etc.

Let us see an example to implement for loop in R. We will display a Vector:

# Vectors
marks <- c(97, 90, 94, 95, 92)

# for loop
for (i in marks) {
  print(i)
}

Output

[1] 97
[1] 90
[1] 94
[1] 95
[1] 92

Let us see another example to implement for loop in R. We will display a List:

# list
students <- list("amit", "john", "david", "rohit", "virat")

# for loop
for (x in students) {
  print(x)
}

Output

[1] "amit"
[1] "john"
[1] "david"
[1] "rohit"
[1] "virat"

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