Iterating through a list.
for i in 1 2 3
do
echo $i
done
# 1
# 2
# 3
Iterating through a list generated with a sequence.
for i in $(seq 1 2 10)
do
echo $i
done
# 1
# 3
# 5
# 7
# 9
seq 1 2 10 creates a list of numbers from 1 to 10 in steps of 2.