In R, the break statement is used to terminate the execution of a loop in certain conditions. It can be used in both for loops and while loops.
Here are some examples:
Example 1: Using break in a for loop
for (i in 1:10) {
if (i == 5) {
break
}
print(i)
}
[1] 1
[1] 2
[1] 3
[1] 4
In this example, the for loop is set to iterate over the numbers 1 to 10. Inside the loop, there is an if statement that checks if the current value of i is equal to 5. If it is, the break statement is executed which causes the loop to terminate immediately. As a result, the loop only iterates up to 4 and the remaining iterations are skipped.
Example 2: Using break in a while loop
i <- 1
while (i <= 10) {
if (i == 5) {
break
}
print(i)
i <- i + 1
}
Output:
[1] 1
[1] 2
[1] 3
[1] 4
This example shows how to use break in a while loop. Initially, the value of i is set to 1. As long as i is less than or equal to 10, the loop will continue to run. Inside the loop, an if statement checks if the current value of i is equal to 5. Once i equals 5, the break statement is executed and the loop immediately terminates. As a result, only the numbers 1 to 4 are printed.
In both examples, the break statement is used to terminate the loop prematurely based on a certain condition.