Xref:Perl/c strcmp()
From CoderGuide
Performing string comparisons in perl similar to C's strcmp
You compare strings using special operators that can be easy to confuse with the <, >, ==, comparison operators. They are:
| eq | strings are equal |
| ne | strings are not equal |
| lt | string is less than |
| gt | string is greater than |
| le | string is less than or equal |
| ge | string is greater than or equal |
| cmp | behaves like c's strcmp(), returns 0 if a match, 1 if greater, -1 if less than. |
#!/usr/bin/perl print "strings are equal\n" if ( "string" eq "string"); print "a is greater than b\n" if ( "a" gt "b"); print "a is less than b\n" if ( "a" le "b"); ## Notice those aren't numerical comparisons? ## Let's see what happens when we use numerical comparison operators... print "string==string equal\n" if ( "string" == "string"); print "a > b\n" if ( "a" > "b"); print "a < b\n" if ( "a"< "b"); print "a == b\n" if ( "a" == "b");
Output:
strings are equal a is less than b string==string equal a == b
As you can clearly see, Perl's numerical comparators and string comparators do not mix.
