Performs conditional processing in batch programs. If the condition
specified by an IF command is true, MS-DOS carries out the command that
follows the condition. If the condition is false, MS-DOS ignores the
command. You can use this command only in batch programs.
IF [NOT] ERRORLEVEL number command
IF [NOT] string1==string2 command
IF [NOT] EXIST filename command
Specifies that MS-DOS should carry out the command only if the condition
Specifies a true condition only if the previous program run by
COMMAND.COM returned an exit code equal to or greater than number.
Specifies the command that MS-DOS should carry out if the preceding
condition is met.
Specifies a true condition only if string1 and string2 are the same.
These values can be literal strings or batch variables (%1, for
example). Literal strings do not need quotation marks.
Specifies a true condition if filename exists.