How to remove 0 from a string using sed

Question

I have string "001.036.020" and I need to convert it to "1.36.20". Saying other words I need to remove all "0" before digit. Is it possible to do this using sed?

Answer 1

This sed should work:

sed 's/0*\([1-9]\)/\1/g'

EDIT: To handle more complex cases like:

• 0s in between digits:
• handle a segment with only 0s (would be collapsed to a single zero)

On Linux:

sed -r -e 's/(^|\.)0+([1-9])/\1\2/g' -e 's/(^|\.)(0)0*(\.|$)/\1\2\3/g'

OR on Mac:

sed -E -e 's/(^|\.)0+([1-9])/\1\2/g' -e 's/(^|\.)(0)0*(\.|$)/\1\2\3/g'

Answer 2

echo '001.036.020' | sed 's/^0*//'