incr(1t) [opensolaris man page]

incr(1T)						       Tcl Built-In Commands							  incr(1T)

__________________________________________________________________________________________________________________________________________________

NAME

       incr - Increment the value of a variable

SYNOPSIS

       incr varName ?increment?
_________________________________________________________________

DESCRIPTION

       Increments the value stored in the variable whose name is varName.  The value of the variable must be an integer.  If increment is supplied
       then its value (which must be an integer) is added to the value of variable varName;  otherwise 1 is added to varName.  The  new  value	is
       stored as a decimal string in variable varName and also returned as result.

EXAMPLES

       Add one to the contents of the variable x:
	      incr x

       Add 42 to the contents of the variable x:
	      incr x 42

       Add the contents of the variable y to the contents of the variable x:
	      incr x $y

       Add  nothing  at  all to the variable x (often useful for checking whether an argument to a procedure is actually numeric and generating an
       error if it is not):
	      incr x 0

SEE ALSO

       expr(1T)

KEYWORDS

       add, increment, variable, value

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWTcl	      |
       +--------------------+-----------------+
       |Interface Stability | Uncommitted     |
       +--------------------+-----------------+
NOTES

       Source for Tcl is available on http://opensolaris.org.

Tcl																	  incr(1T)

set(1T) 						       Tcl Built-In Commands							   set(1T)

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NAME

       set - Read and write variables

SYNOPSIS

       set varName ?value?
_________________________________________________________________

DESCRIPTION

       Returns	the  value  of	variable  varName.   If value is specified, then set the value of varName to value, creating a new variable if one
       doesn't already exist, and return its value.  If varName contains an open parenthesis and ends with a close parenthesis, then it refers	to
       an  array  element:  the characters before the first open parenthesis are the name of the array, and the characters between the parentheses
       are the index within the array.	Otherwise varName refers to a scalar variable.

       If varName includes namespace qualifiers (in the array name if it refers to an array element), or  if  varName  is  unqualified	(does  not
       include	the  names  of any containing namespaces) but no procedure is active, varName refers to a namespace variable resolved according to
       the rules described under NAME RESOLUTION in the namespace manual page.

       If a procedure is active and varName is unqualified, then varName refers to a parameter or local variable of the procedure, unless  varName
       was declared to resolve differently through one of the global, variable or upvar commands.

EXAMPLES

       Store a random number in the variable r:
	      set r [expr rand()]

       Store a short message in an array element:
	      set anAry(msg) "Hello, World!"

       Store a short message in an array element specified by a variable:
	      set elemName "msg"
	      set anAry($elemName) "Hello, World!"

       Copy  a value into the variable out from a variable whose name is stored in the vbl (note that it is often easier to use arrays in practice
       instead of doing double-dereferencing):
	      set in0 "small random"
	      set in1 "large random"
	      set vbl in[expr {rand() >= 0.5}]
	      set out [set $vbl]

SEE ALSO

       expr(1T), global(1T), namespace(1T), proc(1T), trace(1T), unset(1T), upvar(1T), variable(1T)

KEYWORDS

       read, write, variable

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWTcl	      |
       +--------------------+-----------------+
       |Interface Stability | Uncommitted     |
       +--------------------+-----------------+
NOTES

       Source for Tcl is available on http://opensolaris.org.

Tcl																	   set(1T)