Tyl system variables features:

• All system variables names are reserved, and cannot be used as a variable or function name
• A system variable is used as a regular variable
• System variable value can't be changed

Throughout this guide all system variables in code boxes are in dark blue color.

Say we want to print a new line in a text file. We can use newline system variable for it:

System variables are used as regular variables, they can be assigned to another variables:

nl variable was assigned the value of newline system variable. tab and math.pi are also system variables, that were assigned to variables with shortened names. unicode is a system function that is used to get a UNICODE character.

All system variables are in System Variables Reference