Returns an integer value indicating whether the procedure
    verification setting is currently on or off. If used with
    arguments, the F$VERIFY function can turn the procedure and image
    verification settings on or off. You must include the parentheses
    after the F$VERIFY function whether or not you specify arguments.

    Format

      F$VERIFY([procedure-value] [,image-value])

1  –  Return Value

    The integer 0 if the procedure verification setting is off, or
    the integer 1 if the procedure verification setting is on.

2  –  Arguments

 procedure-value

    Specifies an integer expression with a value of 1 to turn
    procedure verification on, or a value of 0 to turn procedure
    verification off.

    When procedure verification is on, each DCL command line in the
    command procedure is displayed on the output device. Procedure
    verification allows you to verify that each command is executing
    correctly.

    If you use the procedure-value argument, the function first
    returns the current procedure verification setting. Then the
    command interpreter turns the procedure verification on or off,
    as specified by the argument.

 image-value

    Specifies an integer expression with a value of 1 to turn image
    verification on, or a value of 0 to turn image verification off.

    When image verification is on, data lines in the command
    procedure are displayed on the output device.

3  –  Examples

    1.$ SAVE_PROC_VERIFY = F$ENVIRONMENT("VERIFY_PROCEDURE")
      $ SAVE_IMAGE_VERIFY = F$ENVIRONMENT("VERIFY_IMAGE")
      $ SET NOVERIFY
         .
         .
         .
      $ TEMP = F$VERIFY(SAVE_PROC_VERIFY, SAVE_IMAGE_VERIFY)

      This example shows an excerpt from a command procedure. The
      first assignment statement assigns the current procedure
      verification setting to the symbol SAVE_PROC_VERIFY. The second
      assignment statement assigns the current image verification
      setting to the symbol SAVE_IMAGE_VERIFY.

      Then, the SET NOVERIFY command disables procedure and image
      verification. Later, the F$VERIFY function resets the
      verification settings, using the original values (equated to
      the symbols SAVE_PROC_VERIFY and SAVE_IMAGE_VERIFY). The symbol
      TEMP contains the procedure verification before it is changed
      with the F$VERIFY function. (In this example, the value of TEMP
      is not used.)

    2.$ VERIFY = F$VERIFY(0)
         .
         .
         .
       $ IF VERIFY .EQ. 1 THEN SET VERIFY

      This example shows an excerpt from a command procedure that
      uses the F$VERIFY function to save the current procedure
      verification setting and to turn both procedure and image
      verification off. At the end of the command procedure, if
      procedure verification was originally on, both the procedure
      and image verification are turned on.