2.3 - Mathematics

Synopsis:

Computers were designed to do mathematics very quickly.

• = is the assignment - it does not check if something is equal

• + and -  for add and subtract

• * and /  for multiply and divide

• ==  "is it equal?" (this is important)

  • Crucial note:  a single equal sign '=' is not used for math! It means "become" or "assign"

• !=  "is it not equal?"

• <  >  <=  >=

• ** for exponent:  4**2 -> 16

• BEDMAS still applies - it is important to utilize parentheses ( ) properly

JavaScript also has a Math object to perform more complex operations.

• Math.PI

• Math.sqrt(number)

• Math.pow(base, exponent)  // same as **

• Math.random()

• And so much more...