I have a for
loop nested in another for
loop. How can I make it so that when somethign happens in the inner loop, we exit and jump to the next iteration of the outer loop?
uuu <- 0
for (i in 1:100) {
uuu <- uuu + 1
j <- 1000
for (eee in 1:30) {
j <- j - 1
if (j < 990) {
# if j is smaller than 990 I hope start next time of i
}
}
}
@flodel has the correct answer for this, which is to use break
rather than next
. Unfortunately, the example in that answer would give the same result whichever control flow construct was used.
I'm adding the following example just to make clear how the behavior of the two constructs differs.
## Using `break`
for (i in 1:3) {
for (j in 3:1) { ## j is iterated in descending order
if ((i+j) > 4) {
break ## << Only line that differs
} else {
cat(sprintf("i=%d, j=%d\n", i, j))
}}}
# i=1, j=3
# i=1, j=2
# i=1, j=1
## Using `next`
for (i in 1:3) {
for (j in 3:1) { ## j is iterated in descending order
if ((i+j) > 4) {
next ## << Only line that differs
} else {
cat(sprintf("i=%d, j=%d\n", i, j))
}}}
# i=1, j=3
# i=1, j=2
# i=1, j=1
# i=2, j=2 ## << Here is where the results differ
# i=2, j=1 ##
# i=3, j=1 ##