for loop in sequential form in R

Question

I want to use the results of the sequential function as an input in the for loop in R, how can I do that? Please see the example below.

x1<-seq(1,100,10)

for (k in x1 ) {
L1<-
L2<- }

The L1 will be 1 and L2 will be 11 for the first loop and L1 will be 11 and L2 will be 21 for the second loop. Thanks

Answer 1

You can loop over the index of x1 :

for (k in seq_along(x1[-1])) {
    L1<- x1[k]
    L2<- x1[k+1]
}

seq_along creates a sequence from 1:length(x1)

seq_along(x1)
#[1]  1  2  3  4  5  6  7  8  9 10

We use -1 because we want the loop to stop at the second last place as there is no k + 1 for last value.