reading-notes

JavaScript - The Brew That Gets You Through

What is JavaScript?

• lightweight, interpreted, or j.i.t. compiled programming language with first-class functions.
• best known as the scripting language for web page it is used in many non-browser environments
  • node.js, amache couchDB, Adobe Acrobat, etc.
• Language Type
  • prototype based, multi-paradigm, single-threaded, dynamic
• Supporting
  • object-oriented, imperative, and declarative (functional) styles.

What are variables in JavaScript?

• variables are containers for storing data (storing data values)

What does it mean to declare a variable?

• the creation of a variable using the keyword var prior to 2015 and let after 2015.
  • ex: var carName; or let carName;
  • these are considered undefined because a value has not yet been assigned using = xyz
  • value can be assigned during declaration as follows let carName = "Volvo"; _{declare variables at beginning of a script}

What is an “assignment” operator and what does it do?

• = is an “assignment” operator. it assigns value to the variable

What is information received from the user called?

• Is this a trick question…? Input…