![]() ![]() So 0x12 is the same as 18 is the same as 022. Numeric values are decimal numbers unless prefixed by 0x for hexadecimal numbers, and 0 for octal numbers. The assignment operator requires an environment variable name to the left of the assignment operator. If SET /A is executed from the command line outside of a command script, then it displays the final value of the expression. Doing this lets you do arithmetic with environment variable values without having to type all those % signs to get their values. If an environment variable name is specified but is not defined in the current environment, then a value of zero is used. ![]() Any non-numeric strings in the expression are treated as environment variable names whose values are converted to numbers before using them. If you use any of the logical or modulus operators, you need to enclose the expression string in quotes. The expression evaluator is pretty simple and supports the following operations, in decreasing order of precedence: () - grouping The /A switch specifies that the string to the right of the equal sign is a numerical expression that is evaluated. Two new switches are added to the SET command: SET command doesn't allow an equal sign to be part of the name of a variable. SET command sets the ERRORLEVEL to 1 if the variable name is not found in the current environment. Would display all variables that begin with the letter 'P.' SET command invoked with a variable name, no equal sign or value displays the value of all variables whose prefix matches the name given to the SET command. If Command Extensions are enabled SET changes as follows: ![]() Type SET without parameters to display the current environment variables. Specifies several characters to assign to the variable.
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