• Bash Get File Version
• Batch Script Check File Version In Linux

. Part 5 – If/Then Conditionals.Computers are all about 1’s and 0’s, right?

Bash Get File Version

Batch Script Check File Version In Linux

So, we need a way to handle when some condition is 1, or else do something differentwhen it’s 0.The good news is DOS has pretty decent support for if/then/else conditions. Checking that a File or Folder Exists IF EXIST 'temp.txt' ECHO foundOr the converse: IF NOT EXIST 'temp.txt' ECHO not foundBoth the true condition and the false condition: IF EXIST 'temp.txt' (ECHO found) ELSE (ECHO not found)NOTE: It’s a good idea to always quote both operands (sides) of any IF check. This avoids nasty bugs when a variable doesn’t exist, which causesthe the operand to effectively disappear and cause a syntax error. Checking If A Variable Is Not Set IF '%var%' (SET var=default value)Or IF NOT DEFINED var (SET var=default value)Checking If a Variable Matches a Text String SET var=Hello, World!IF '%var%'Hello, World!' (ECHO found)Or with a case insensitive comparison IF /I '%var%'hello, world!' (ECHO found)Artimetic Comparisons SET /A var=1IF /I '%var%' EQU '1' ECHO equality with 1IF /I '%var%' NEQ '0' ECHO inequality with 0IF /I '%var%' GEQ '1' ECHO greater than or equal to 1IF /I '%var%' LEQ '1' ECHO less than or equal to 1Checking a Return Code IF /I '%ERRORLEVEL%' NEQ '0' (ECHO execution failed)Posted by Steve Jansen Mar 1 st, 2013,.