Although there are more than 100 functions in C/AL, there are several functions that you will use more often than the others.
1. GET, FIND, and NEXT Functions
2. SETCURRENTKEY, SETRANGE, SETFILTER, GETRANGEMIN, and GETRANGEMAX Functions
3. INSERT, MODIFY, MODIFYALL, DELETE and DELETEALL Functions
4. LOCKTABLE Function
5. CALCFIELDS, CALCSUMS,FIELDERROR, FIELDNAME, INIT, TESTFIELD, and VALIDATE Functions
6. Progress Windows, MESSAGE, ERROR and CONFIRM Functions
7. STRMENU Function
