In this example,
z, are variables:
var x = 5; var y = 6; var z = x + y;
One of the most fundamental characteristics of a programming language is the set of data types it supports. These are the type of values that can be represented and manipulated in a programming language.
Numbers, eg. 123, 120.50, etc.
Strings of text e.g. "This text string" etc.
Boolean e.g. true or false.
Local Variables − A local variable will be visible only within a function where it is defined. Function parameters are always local to that function.