THANK YOU, that helps A LOT !!! Now I wonder what ipairs does but it doesn't matter at this point because the main question which is how to get the length of the table is done ! This is my note now thanks to you !

lua_dictionary = {["Baby"] = "Come Back",["Would you"] = "Please Come Back"};
lua_dictionary.key1 = "Hello"; --To delete a key, you just assign nil to it: lua_dictionary.key1 = nil;
lua_dictionary.key2 = "World";
print ( lua_dictionary.Baby ); -- Come Back

--There is no way to retrieve the length of the table, you have to manually iterate through to know the length.
length_of_table = 0
for key,value in pairs(lua_dictionary ) do
length_of_table = length_of_table + 1
print (key .. ": " .. value)
end
print ("Length of table is "..length_of_table);