how to make deep for loop in linux code example

Example 1: for loop in bash for files

#!/bin/bash
FILES=/path/to/*
for f in $FILES
do
  echo "Processing $f file..."
  # take action on each file. $f store current file name
  cat $f
done

Example 2: how to collect values from each iteration of a loop and save them bash

results=()

for time in ${seconds_list}; do
    results+=($(bc -l <<< "scale=2; ($cur_time-$time)/3600"))
done

# print the results:

printf "%s\n" "${results[@]}"