gongchenwei的专栏

<br /> <br />Spaces are not required around the square brackets used for command substitution. For the purposes of grouping, the interpreter considers everything between the square brackets as part of the current group. The following sets x to the concaten

<br />eg:<br /> <br />set var {the value of var}<br /> => the value of var<br /> set name var<br /> => var<br /> set name<br /> => var<br /> set $name    ## here, the name will be replaced by "var", so <=> set $var  => the below result<br /> => the

<br /> <br />Tcl 运算符和数学函数~/tcltk$ cat maths.tcl<br /> #!/usr/bin/tclsh<br /> #<br /> # Demonstrate operators and<br /> # math functions<br /><br /> set PI [expr 2 * asin(1.0)]<br /><br /> if {$argc == 3} {<br /> set X [lindex $argv 0]<br /> set