[[ 2 -lt 3.14 ]]
[[ 200 -lt 314 ]] # Use fixed point math [[ $(echo "2 < 3.14" | bc) == 1 ]] # Use bc
Bash and Posix sh does not support decimals in numbers. Decimals should either be avoided, or compared using a tool that does support them.
If the strings happen to be version numbers and you're using
> to compare them as strings, and you consider this an acceptable thing to do, then you can ignore this warning.
ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.