bash shell script two variables in for loop

Question

I am new to shell scripting. so kindly bear with me if my doubt is too silly.

I have png images in 2 different directories and an executable which takes an images f

Answer 1

I have this problem for a similar situation where I want a top and bottom range simultaneously. Here was my solution; it's not particularly efficient but it's easy and clean and not at all complicated with icky BASH arrays and all that nonsense.

SEQBOT=$(seq 0  5  $((PEAKTIME-5)))
SEQTOP=$(seq 5  5  $((PEAKTIME-0)))

IDXBOT=0
IDXTOP=0

for bot in $SEQBOT; do
    IDXTOP=0
    for top in $SEQTOP; do
        if [ "$IDXBOT" -eq "$IDXTOP" ]; then
            echo $bot $top
        fi
        IDXTOP=$((IDXTOP + 1))
    done
    IDXBOT=$((IDXBOT + 1))
done