- JavaScript has syntax AND grammar
- Expressions and statements
- Statements are 1:1 and end with a semicolon (e.g. a = b * 2;)
- ‘2’ is a numerical expression
- ‘b’ is an identifier expression
- ‘b * 2’ is a mathematical expression
- ‘a = b * 2’ is a statement expression
- JavaScript uses operator precedence, but added unnecessary parenthesis are fine for aiding developer reading
- JS gets compiled for error checking instead of interpreting line by line and then throwing an error
- Console prints out different data types in different colors … numbers in blue are mathematical, whereas black is a string
- .String(a) … is conversion … which is explicit
- Coercion is implicit
- Declare variables with var, let, const, or function d()
- “falsy” values = 0, -0, Nan, “”, false, null, undefined
- while (a) { … } – keep doing until ‘a’ is falsy
- It’s an argument when it gets passed in, but it’s a parameter if you declare it … function(myParam)
