set - Read and write variables
set varName ?value?
set(1t) Tcl Built-In Commands set(1t) ______________________________________________________________________________ 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 does not 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 vari- able. 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 var- Name 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] ATTRIBUTES See attributes(7) for descriptions of the following attributes: +---------------+------------------+ |ATTRIBUTE TYPE | ATTRIBUTE VALUE | +---------------+------------------+ |Availability | runtime/tcl-8 | +---------------+------------------+ |Stability | Uncommitted | +---------------+------------------+ SEE ALSO expr(n), global(n), namespace(n), proc(n), trace(n), unset(n), upvar(n), variable(n) KEYWORDS read, write, variable NOTES Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from http://prdownloads.sourceforge.net/tcl/tcl- core8.6.7-src.tar.gz. Further information about this software can be found on the open source community website at https://www.tcl.tk/. Tcl set(1t)