JavaScript Scratches

Arithmetica

Operators

Dealing with digits is done using some familiar (and not so familiar) arithmetic symbols (operators).

Most of these require 2 'literal' numbers or variables to work with.

Addition

• +
  add 2 numbers or variables together
  let i = 34 + 66;
  let j = 23+77;
  let s = -78;
  let t = 42;
  let u = s + t;
  let v = s + t + i + j;

Subtraction

• -
  subtract 1 number or variable from another
  let I = 34 - 77;
  let J = -77 - 34;
  let K = J - I;
  

Multiplication

• *
  multiply 2 operands
  let a = 3;
  let b = 4;
  let c = a * b;
  

Division

• /
  divide 2 operands
  let A = 34;
  let B = 3;
  let C = A / B;
  

Remainder (Modulus)

• %
  the division remainder
  let AA = 34;
  let BB = 3;
  let CC = AA % BB;
  

This is a handy operator if you've not seen or used it. Useful when calculating seconds, minutes, and hours into discrete units. Or miles into feet / yards into inches, etc.

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