Next Continue in R

In R, next and continue are used to skip certain iterations during a loop. The difference between next and continue is that next skips the current iteration while continuing with the next iteration in the loop, whereas continue stops the current iteration and goes on with the next one.

Here are some examples:

# Example 1: Using next to skip specific iterations in a for loop 
for (i in 1:10) {
  if (i %% 2 == 0) {    # if i is even number, skip the loop iteration
    next
  }
  print(i)
}
# Output: 1 3 5 7 9

In this example, we used next to skip the loop iteration for even numbers. The print statement is only executed for odd numbers.

# Example 2: Using continue to skip specific iterations in a while loop
i <- 0
while (i < 10) {
  i <- i + 1
  if (i %% 2 == 0) {  # if i is even number, skip the loop iteration
    next
  }
  print(i)
}
# Output: 1 3 5 7 9

In this example, we used next to skip the loop iteration for even numbers in a while loop.

# Example 3: Using continue to skip the current iteration in a for loop
for (i in 1:10) {
  if (i == 5) {    # if i is equal to 5, stop the current iteration
    next
  }
  print(i)
}
# Output: 1 2 3 4 6 7 8 9 10

In this example, we used next to skip the current iteration when i is 5. The loop continues with the next iteration.

# Example 4: Using break to exit the loop when a condition is met
for (i in 1:10) {
  if (i == 5) {    # if i is equal to 5, exit the loop
    break
  }
  print(i)
}
# Output: 1 2 3 4

In this example, we used break to exit the loop when i is 5. The loop terminates and the next line of code is executed.