Example

 $ IF F$MODE() .NES. "INTERACTIVE" THEN GOTO NON_INT_DEF
 $ INTDEF:         ! Commands for interactive terminal sessions
    .
    .
    .
 $ EXIT
 $ NON_INT_DEF:         !Commands for noninteractive processes
    .
    .
    .


     This example shows the beginning of a login.com file that has
     two sets of initialization commands: one for interactive mode
     and one for noninteractive mode (including batch and network
     jobs). The IF command compares the character string returned
     by F$MODE with the character string INTERACTIVE; if they are
     not equal, control branches to the label NON_INT_DEF. If the
     character strings are equal, the statements following the
     label INTDEF are executed and the procedure exits before the
     statements at NON_INT_DEF.