TYL PROGRAMMING LANGUAGE
▶ VARIABLES
Variables are used to store data, while the program is running.
Regular variables as strings, numbers, real numbers and booleans, are called scalar variables.

Here are some scalar variables declarations:
name 'Tony'
age 22
height 176.80
isstudent \t
Tyl scalar variables features:

Tyl has also list variables, that can store a list of items.

Consider these list variables declarations:
names 'Tony' 'Carla' 'Ron'
data [ 22 28 17 ]
Tyl list variables features:
While it is common to declare a variable and assign a value to it in the same line, Tyl permits variable declaration without value assignment.

In this code:
prices
sumtotal
prices variable will be defined as a list without items, and sumtotal variable will have undefined type, which is considered NULL.
Attention: The token 's' is also a list variable!

For more Information about variables: