Again, I got occupied with other things and could not continue the tutorials as planned, but I will ensure I take it to the place I planned.
In the last tutorial, I wrote about Type conversion and Type coercion, and I gave some clear examples and deep explanation about it. Today, we will look at Math object in JavaScript. Unlike, I have been using image to show example, I will write the codes here and you can test them on your editors and check the output as well.
So, let's roll!
const fil1 = 80;
const fil2 = 20;
let fil;
Basic math
fil = fil1 + fil2;
fil = fil1 - fil2;
fil = fil1 * fil2;
fil = fil1 / fil2;
fil = fil1 % fil2;
console.log(fil);
Math Objects
fil = Math.PI;
Math contains properties and methods. Properties are attributes and method is a function inside an object. PI= 3.141592653589793.
fil = Math.E;
This will give us 2.718281828459045
Checking for more helpful methods, we will check round, round up, down and a few.
fil = Math.round(5.8);
.round will round up and down. 5.4 would round down and 5.8 would round up, but you could specify by using. ceil or floor.
Round up
fil = Math.ceil(5.4);
This will give 6.
fil = Math.floor(5.8);
This will give 5.
Others are:
fil = Math.sqrt(200);
fil = Math.abs(-4);
Abs is Absolute and the negative number will turn to positive.
fil = Math.pow(10, 2);
100- same as 10*10
fil = Math.min(2,21,89,23,9,-4);
This will output the minimum number which is -4
fil = Math.max(5,99,9,36,2,8);
The Max number is 99
fil = Math.random();
This will give a random numbers and if you want to get a random whole number, you may need to specify.
fil = Math.random() * 30;
29 will be the highest number with decimals. If you want to have 30, you will need to add on 1 and to take way the decimals, you just need to wrap it with Math.floor
fil = Math.floor(Math.random() * 30 + 1);
This is where I will stop today. I hope you get something from it. See you guys on Thursday.