Tcl Script Learning five: basic operations

Lesson 5: Basic Mathematical calculations

1. Set X 100;
Set Y 256;
Set Z [expr "$Y + $X"]
Can also be written as set Z [expr {$Y + $X}]

2. Set Z_label "$Y plus $X is"
Puts "$Z _label $Z"
Puts "The square root of $Y is [expr sqrt ($Y)]\n"
The formula for finding the root of expr is usually taken [] as the return value

3.puts "Because of the precedence rules \" 5 +-3 * 4\ "is: [expr-3 * 4 + 5]"
Puts "Because of the Parentheses \" (5 +-3) * 4\ "is: [Expr (5 +-3) * 4]"
Basic rules of operation
Puts "\ n ... more examples of differences between \" and \{"..... more
puts {$Z _label [expr $Y + $X]}
Puts "$Z _label {[expr $Y + $X]}"
Puts "the command to add both numbers is: \[expr \ $a + \ $b]"
Examples of parentheses

Tcl Script Learning five: basic operations