Lantronix SLC 8000 Advanced Console Manager User Guide - Page 227

9: Device Ports Secondary commands provide support for the primary commands and are generally not useful by themselves. For example, the expr command can be used to generate a value for a set command. set [expr 1 + 1] Control Flow commands allow conditional execution of other commands based on the results of the evaluation of a Boolean expression. Table 9-19 Definitions Term Definition Word A contiguous group of characters delimited on either side by spaces. Not enclosed by double quotes. Primary Command One of the primary commands listed in this section. Secondary Command One of the secondary commands defined in this section. Quoted String A group of characters enclosed by double quote (") characters. A quoted string may include any characters, including space characters. If a double quote character is to be included in a quoted string it must be preceded (escaped) by a backslash character ('\'). Variable Reference A word (as defined above) preceded by a dollar sign character ('$'). CLI Command A quoted string containing a valid CLI show command. Arithmetic Operator A single character representing a simple arithmetic operation. The character may be one of the following:  A plus sign (+) representing addition  A minus sign (-) representing subtraction  An asterisk sign (*) representing multiplication  A forward slash (/) representing division  A percent sign (%) representing a modulus Boolean Expression An expression which evaluates to TRUE or FALSE. A Boolean expression has the following syntax: Each can be either a word or a variable reference. Boolean Operator A binary operator which expresses a comparison between two operands and evaluates to TRUE or FALSE. The following Boolean operators are valid:  '' greater than  '=' greater than or equal to  '==' equal to  '!=' not equal to SLC™ 8000 Advanced Console Manager User Guide 227