Difference between length of empty string in aix and linux

[tauqeer]

I am comparing two characters,one of which is a greek symbol and other is an empty string. The length of greek symbol is constant in both the platforms, so there might be a problem with the length of empty string returned.

Will there be any difference between length of empty string in aix and linux machines as the byte formats might differ.

[jsmith]

A string with length 0 is said to be "empty". Any other length string is not empty.