round, ceil, floor, etc

round.coffee

# same only can leave off parens and ;

round.js

Math.round(2.8); // round to nearest integer => 3
Math.floor(2.8); // largest integer less or equal to number => 2
Math.ceil(3.2); // smallest integer greater or equal to number => 4
Math.trunc(2.8); // remove fractional digits => 2 ; experimental
Math.trunc(-2.8); // -2
Math.floor(-2.8); // -3

num.toFixed(2); // round to two decimal places
Math.round(num * 100) / 100 // another way to round to two decimal places

round.rb

# use .ceil, .floor, .round, .truncate
# .round(n) rounds to n decimal digits