Within "man sh-posix" see the section on "Conditonal Expressions" for the explanation of conditions within [[ ]] .
See "man test" for an explanation of "Test" within [ ] .
Though there is some common syntax between a "Conditional Expression" and a "Test" there is also much syntax which is exclusive. For example the AND and OR operators are quite different.
As far as I know, there is no ">" operator.
I have never found use for (( )) as an Arithmetic Test and cannot comment. Others may have seen it used.
BEWARE. The ">" sign you are using is not valid syntax. Your test scripts may not be doing what you expect.
Quote:
if [ 234 > 71 ];then
echo "correct"
else
echo "wrong"
fi
The above script creates a FILE called "71" and the "if" test is "true" because this process worked.
Suggest you check all your examples for this problem and check the directory list after each try!