You can assign Var variables with the Value of Other Variables.
You can combining 'Var' Data Types
output is 150 is the total
Primary Data Types (Primitive)
Composite Data Types (reference)
Special Data Types
A string literal is a sequence of characters delimited by single or double quotes. It exist within either single quotes ' or double quotes ", so to create a string , enclose a sequence of characters in quotes.
A variable that has not been assigned a value has the value undefined .