Browse - Programming Tips - How can I increment a variable in a loop?

Date: 2016mar6
Language: bash

Q.  How can I increment a variable in a loop?

A.  The modern way to increment a variable in bash is:

((var++))

where var is the name of your variable.

In a loop:

i=1
for orig in `ls *.jpg`; do
	padded=`printf '%03d' $i`
	mv $orig $padded.jpg
	((i++))
done