JS basics

• Math order: PEMDAS (Parenthesis - Exponential - Multiplication - Division - Addiction - Subtraction)

• // → To create a comment in the JS code

• % → modul (mod)

• ** → exponential

• NaN → not a number (something impossible or irrelevant as a mathematical number) that the code considers a number.

• variable name rules:

  • no spaces
  • digits cannot be the beginning of the name
  • in case of multiple words name use cammel case (iAmSam), lower case only for the firs word
  • define GOOD memorable names

• String: primitive type that contains textual

• && → and, it unifies two concepts and both have to be true

• || → or, at least one of the conditions is true. The answer is false, only if every condition is false.

• && has preference over ||. To make it clearer, it’s possible to use ().

• ! → not. It reverse the value of a concept. If it’s false it becomes true. And viceversa.