NAV FIND() VS FINDFIRST(), VS FINDLAST()

FIND() is used with parameters. Based on the parameters passed in FIND()  different results set. 

• FIND('-') : To search the first record in the table
• FIND('+') : TO search the last record in the table.

However FIND is an old function. Instead of FIND('-') FINDFIRST() function can be used, FINDLAST() function can be used instead of FIND('+'). 

After searching in the internet, it seems FINDFIRST(), FINDLAST() functions are efficient and faster compared to the FIND('-'), FIND('+').

However when it comes to REPEAT,UNTIL function, We shouldn't use FINDFIRST().