For loop in BASH can be written in many ways , it could use a numeric counter
or it could use an array . here are some example that may help :
1. Count up loop in BASH, from 0 to 100
for i in `seq 0 100` ; do echo $i ;done
2. Countdown loop in BASH , from 100 to 0
for i in `seq 100 -1 0` ; do echo $i ;done
3. Array variable as increment loop in BASH
ar="one two three four five six eight nine ten" for i in $ar ;do echo $i ;done
4. Array as increment loop in BASH
for i in one two three four five ;do echo $i ;done
5. For loop without seq
for i in {1..100} ; do echo $i ;done