awk or substr - UNIX for Dummies Questions & Answers

ramky79 · #1 03-12-2007

i have a variable 200612
the last two digits of this variable should be between 1 and 12, it should not be greater than 12 or less than 1 (for ex: 00 or 13,14,15 is not accepted)
how do i check for this conditions in a unix shell script.

thanks
Ram

BOFH · #2 03-12-2007

Nevemind; misread question.

Carl

reborg · #3 03-12-2007

Code:

[[ ${var#????} -lt 13 ]] && [[ ${var#????} -gt 0 ]] 
....

cfajohnson · #4 03-13-2007

Quote:

Originally Posted by ramky79

i have a variable 200612
the last two digits of this variable should be between 1 and 12, it should not be greater than 12 or less than 1 (for ex: 00 or 13,14,15 is not accepted)
how do i check for this conditions in a unix shell script.

Code:

var=200612
last2=${var#"${var%??}"}
if [ ${last2#0} -lt 1 ] || [ ${last2#0} -gt 12 ] 
then
   printf "INVALID %s\n" "$var" >&2
fi

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