In 4D language, the comparsion operators "=" and "#" are case-insensitive when comparing strings. For instance, if we have the following variables:

$str1:="hello" $str2:="HELLO" $bool1:=$str1=$str2 $bool2:=$str1#$str2

The value of $bool1 will be True, and the value of $bool2 will be False.

To perform a case-sensitive string comparsion, use either Character code for single-character strings or Generate digest for multi-character strings. The former returns the Unicode UTF-16 code of a character, and the latter returns the digest key of a string. For example, if we have the following variables:

$str1:="world" $str2:="WORLD" $str3:="world" $bool1:=Generate digest($str1;4D digest)=Generate digest($str2;4D digest) $bool2:=Generate digest($str1;4D digest)#Generate digest($str2;4D digest) $bool3:=Generate digest($str1;4D digest)=Generate digest($str3;4D digest)

The value of $bool1 will be False, the value of $bool2 will be True, and the value of $bool3 will be True.