DIFFERENCE( ) Function Example

STORE 'Smith' TO gcName1
STORE 'Smythe'  TO gcName2
STORE 'Smittie' TO gcName3
STORE '' TO gcName4
CLEAR
? DIFFERENCE(gcName1, gcName2)  && Displays 4
? DIFFERENCE(gcName1, gcName3)  && Displays 4
? DIFFERENCE(gcName1, gcName4)  && Displays 1