ID 683325
Date 9/24/2018
Public

## 2.13.1. Hello World Example

The following shows the basic “Hello world” example in Tcl:
puts "Hello world"

Use double quotation marks to group the words hello and world as one argument. Double quotation marks allow substitutions to occur in the group. Substitutions can be simple variable substitutions, or the result of running a nested command. Use curly braces {} for grouping when you want to prevent substitutions.