javascript expressions

1An expression is any valid set of literals, variables, operators, and 
2expressions that evaluates to a single value. The value may be a number, 
3a string, or a logical value. Conceptually, there are two types of 
4expressions: those that assign a value to a variable, and those that 
5simply have a value.

1// EXPRESSION: Code that produces a value
2// example(s):
33 + 4
41991
5true && false && false
6
7// STATEMENT: Code that performs actions (generally something that ends in ";"
8// example:
9const str = `String assigned to str`;