how to use bash For loop in Linux

For Loop over a number range in Bash

We can use the sequence expression to specify a range of numbers or characters by defining a start and the end point of the range.

1. seq start end
2. {start..end}

All the following for loop example iterates through all numbers from 0 to 3.

for i in {0..3}
do
  echo "Number: $i"
done
for i in $(seq 0 3)
do
  echo "Number: $i"
done
for i in `seq 0 3`
do
  echo "Number: $i"
done

This is the output.

Number: 0
Number: 1
Number: 2
Number: 3

Check this post to learn more about how to use for loop in bash.