#    
## Overview
A **`for`** loop in R is used to iterate over a sequence for a specific number of times. The number of iterations is determined by a conditional statement (the expression) within the `for` loop.

To declare a `for` loop in R, use the syntax below:
```
for(expression){
  statement(s)
}
```
The `expression` represents the given condition, while the `statement` represents what the code should execute if the `expression` is `TRUE`.

`for` loops are especially useful if you need to repeat the same code until a particular condition is met.


## Example 1

#    
## Explanation
In the code above, we state a condition that for `x` having values starting from `1` to `5` (these are the iterations), R should print all of the values of `x`.

This `for` loop is not like the `for` keyword in other programming languages, but rather more of an iterator method that can be found in other object-oriented programming languages.

## Example 2

We can also print all the items of a list with a `for` loop. 


countries <- list("USA", "FRANCE", "UK", "CANADA")

for (x in countries) {
  print(x)
}

#    
## Explanation
In the code above, we create a `list` variable named `countries` and use the `for` loop to iterate over each item of the list. We then ask R to print all the items in the list.

>Note: The `for` loop differs from the `while` loop because the `for` loop does not require an index variable, unlike the `while` loop.

How to use for loops in R

Iterate over a sequence in R using for loops, executing code for each item in the specified range or list.