It's common to try to remember what's the right call for Math functions, hence adding this to my local KB here.
Always the same principle, Math.function(<params>).
Round:
var a = 123.45;
var b = 345.67;
console.log(Math.round(a));
console.log(Math.round(b));
//outputs: 123
//outputs: 346
Ceiling (ceil):
var a = 123.45;
var b = 345.67;
console.log(Math.ceil(a));
console.log(Math.ceil(b));
//outputs: 124
//outputs: 346
Floor:
var a = 123.45;
var b = 345.67;
console.log(Math.floor(a));
console.log(Math.floor(b));
//outputs: 123
//outputs: 345
Max:
var a = 123.45;
var b = 345.67;
console.log(Math.max(a, b));
//outputs: 345.67
Min:
var a = 123.45;
var b = 345.67;
console.log(Math.min(a, b));
//outputs: 123.45
Random:
function getRandomInteger(limitIntValue) {
return Math.round(Math.random() * limitIntValue);
}
function getRandomNumber(limitNumberValue) {
return (Math.random() * limitNumberValue);
}
console.log(getRandomInteger(10));
console.log(getRandomInteger(-10));
console.log(getRandomNumber(123.45));
//outputs: <random integer value between 0 and 10>
//outputs: <random integer value between -10 and 0>
//outputs: <random number value between 0 and 123.45>
