The string following the ENTRY command (max. 8 characters) is used in the `@@' command to select the code segment in the file exa18.prg. Thus, @@ exa18,2 old will result in the display of the line: `Parameter 1 = old'; the following ENTRY statements indicates the end of this code segment and acts like a RETURN statement. Entering @@ exa18,third produces the output: `Parameter 1 = spiral'; and @@ exa18 -12 will execute the lines with no preceding ENTRY statement, i.e. write: `Parameter 1 = -12'. This example also shows that parameter P1 is not global, that means it has to be defined in each ENTRY segment of the procedure file.
Entries may also be used to structure the contents of a MIDAS procedure. In the following example, the procedure exa18.prg executes different code segments according to its first parameter.

!+
! Example 19, MIDAS procedure exa19.prg
!+
DEFINE/PARAM P1 000 C "Enter control flags for entries: "
DEFINE/PARAM P2 sombrero IMA "Enter image to work with: "
DEFINE/MAXPAR 2 ! max 2 parameters expected
!
DEFINE/LOCAL LOOP/I/1/1 0
DEFINE/LOCAL CCC/C/1/3 P1(1:3)
SET/FORMAT I1
DO LOOP = 1 3
IF CCC(LOOP:LOOP) .EQ. "1" @@ exa19,000LOOP P2
ENDDO
!
! here the different sub-procedures
!
ENTRY 0001
!
CREA/IMAGE P1 2,256,256 ? gauss 128.5,128,128.5,128
!
ENTRY 0002
!
READ/DESCR P1
!
ENTRY 0003
!
STATIST/IMAGE P1