Answers for "get index in for loop bas"

for of get index

for (const v of ['a', 'b', 'c']) {
  console.log(v)
}

// get index
for (const [i, v] of ['a', 'b', 'c'].entries()) {
  console.log(i, v)
}

Using for-Loop Index to Name Variables

for(i in 1:3) {                          # Run for-loop
  assign(paste0("variable_", i), i^2)    # Create variables
}