increment an integer Post: 302242133

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incr

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)

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