IF

Format:    IF [NOT] [WARN | ERROR | FAIL] (string)  [EQ | GT |GE (string)] [VAL] {EXISTS (filename)]
Template:  NOT/S,WARN/S,ERROR/S,FAIL/S,EQ/K,GT/K,GE/K,VAL/S,EXISTS/K
Location:  Internal 

in a script file, IF, when its conditional is true, carries out all the subsequent command until an ENDIF, however, ELSE, command is found. IF must be used in conjunction with ENDIF, however, ELSE is optional. When the conditional is not true, execution skips directly to the ENDIF or to an ELSE. The conditons and commands in IF and ELSE blocks can span more than one line begore their corresponding ENDIF's.

Nested if's jump to the matching ENDIF.

Keywords are as follows:

NOT         Reverses the interpretation of the result.
WARN        True if previous return code is greater thab or equal to 5. 
ERROR       True if previous return code is greater than or equal to 10; only available if 
            FAILAT   is set to greater than 10
FAIL        True if previous return code is greater than or equal to 20; only available if 
            failat is set to greater than 20.
(a) GT (b)  True if test of a is greater than the text of b.  Use NOT GT for less than.
(a) GE (b)  True if a text of a greater than or equal to a text of b. Use NOT GE for
            less than or equal to b.
(a) EQ (b)  True if the text of a and b is identical.
VAL         Specifies a numeric comparison
EXISTS      True if the file exists. 
    

If the previous command produces a return code greater than or equal to 10, AmigaDOS skips over the ECHO command to the errlab lable.

Example:

If error

skip errlab

ENDIF

See also: EXECUTE, FAILAT, LAB, QUIT, SKIP.