Revisions to Checking if an input number is an integer

deleted 1 character in body

edited Oct 15, 2016 at 23:11

For unsigned integers I use:

read -r scale [ -z "${scale//[0-9]/}" ] && [ -n "$scale" ] || echo "Sorry integers only"

Tests:

$ ./test.sh 7 $ ./test.sh 777 $ ./test.sh a Sorry integers only $ ./test.sh "" Sorry integers only $ ./test.sh Sorry integers only

For unsigned integers I use:

read -r scale [ -z "${scale//[0-9]/}" ] && [ -n "$scale" ] || echo "Sorry integers only"

Tests:

$ ./test.sh 7 $ ./test.sh 777 $ ./test.sh a Sorry integers only $ ./test.sh "" Sorry integers only $ ./test.sh Sorry integers only

For unsigned integers I use:

read -r scale [ -z "${scale//[0-9]}" ] && [ -n "$scale" ] || echo "Sorry integers only"

Tests:

$ ./test.sh 7 $ ./test.sh 777 $ ./test.sh a Sorry integers only $ ./test.sh "" Sorry integers only $ ./test.sh Sorry integers only

added 3 characters in body

edited Oct 15, 2016 at 1:23

For unsigned integers I use:

read -r scale [ -z "${scale//[0-9]/}" ] && [ -n "$scale" ] || echo "Sorry integers only"

Tests:

$ ./test.sh 7 $ ./test.sh  777 $ ./test.sh a Sorry integers only $ ./test.sh "" Sorry integers only $ ./test.sh Sorry integers only

For unsigned integers I use:

read -r scale [ -z "${scale//[0-9]/}" ] && [ -n "$scale" ] || echo "Sorry integers only"

Tests:

$ ./test.sh 7 $ ./test.sh 777 $ ./test.sh a Sorry integers only $ ./test.sh "" Sorry integers only $ ./test.sh Sorry integers only

For unsigned integers I use:

read -r scale [ -z "${scale//[0-9]/}" ] && [ -n "$scale" ] || echo "Sorry integers only"

Tests:

$ ./test.sh 7 $ ./test.sh  777 $ ./test.sh a Sorry integers only $ ./test.sh "" Sorry integers only $ ./test.sh Sorry integers only

answered Oct 15, 2016 at 1:10

For unsigned integers I use:

read -r scale [ -z "${scale//[0-9]/}" ] && [ -n "$scale" ] || echo "Sorry integers only"

Tests:

$ ./test.sh 7 $ ./test.sh 777 $ ./test.sh a Sorry integers only $ ./test.sh "" Sorry integers only $ ./test.sh Sorry integers only

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